{"id":1426,"date":"2020-05-10T13:40:35","date_gmt":"2020-05-10T05:40:35","guid":{"rendered":"http:\/\/blog.ywdevops.cn\/?p=1426"},"modified":"2024-03-01T10:51:09","modified_gmt":"2024-03-01T02:51:09","slug":"for","status":"publish","type":"post","link":"https:\/\/blog.ywdevops.cn\/index.php\/2020\/05\/10\/for\/","title":{"rendered":"shell\u5faa\u73af\u4e0e\u7ed3\u6784\u5316\u547d\u4ee4"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">for\u5faa\u73af\u6709\u4e09\u79cd\u683c\u5f0f\uff0c\u7b2c\u4e00\u79cd\u662f\u5217\u8868for\u5faa\u73af\uff0c\u4e00\u79cd\u662f\u4e0d\u5e26\u5217\u8868\u7684for\u5faa\u73af\uff0c\u7b2c\u4e09\u79cd\u662f\u7c7b\u4f3cC\u8bed\u8a00\u98ce\u683c\u7684for\u5faa\u73af\u3002<\/p>\n\n\n\n<p class=\"has-text-align-center has-vivid-purple-color has-text-color has-medium-font-size wp-block-paragraph\"><strong>\u5217\u8868for\u5faa\u73af<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\uff1a\u65b0\u5efa\u811a\u672cfor.sh\uff0c\u811a\u672c\u5185\u5bb9\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"597\" height=\"229\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/18-1.png\" alt=\"\" class=\"wp-image-1427\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/18-1.png 597w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/18-1-300x115.png 300w\" sizes=\"auto, (max-width: 597px) 100vw, 597px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u56fe\u4e2d\u7684do done\u4e4b\u95f4\u7684\u5185\u5bb9\u79f0\u4e3a\u5faa\u73af\u4f53\uff0c\u4e00\u5171\u6267\u884c\u4e865\u6b21\uff0c\u6253\u53705\u4e2a\u7ed3\u679c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5217\u8868for\u5faa\u73af\u4e2d\u4e5f\u652f\u6301\u7565\u5199\u7684\u65b9\u5f0f\uff0c\u5c061\u52305\u7684\u6570\u5b57\u7565\u5199\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"587\" height=\"229\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/19-1.png\" alt=\"\" class=\"wp-image-1428\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/19-1.png 587w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/19-1-300x117.png 300w\" sizes=\"auto, (max-width: 587px) 100vw, 587px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">shell\u4e2d\u8fd8\u652f\u6301\u6309\u7167\u4e00\u5b9a\u7684\u6570\u503c\u9012\u589e\u7684\u65b9\u5f0f\u8fdb\u884c\u5faa\u73af\uff0c\u8ba1\u7b971\u5230100\u4e4b\u95f4\u6240\u6709\u5947\u6570\u7684\u548c\uff0c\u5982\u56fe\uff1avar\u7684\u503c\u6bcf\u6b21\u9012\u589e\u521d\u59cb\u4e3a1\uff0c\u6bcf\u6b21\u52a02<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"594\" height=\"253\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/20-1.png\" alt=\"\" class=\"wp-image-1430\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/20-1.png 594w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/20-1-300x128.png 300w\" sizes=\"auto, (max-width: 594px) 100vw, 594px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528seq\u547d\u4ee4\u540c\u6837\u53ef\u4ee5\u5b9e\u73b0\u6309\u7167\u4e00\u5b9a\u6570\u503c\u9012\u589e\u7684\u65b9\u5f0f\u5faa\u73af\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"590\" height=\"243\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/21-1.png\" alt=\"\" class=\"wp-image-1431\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/21-1.png 590w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/21-1-300x124.png 300w\" sizes=\"auto, (max-width: 590px) 100vw, 590px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">for\u5faa\u73af\u4e5f\u53ef\u4ee5\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u64cd\u4f5c\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"585\" height=\"193\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/22-2.png\" alt=\"\" class=\"wp-image-1432\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/22-2.png 585w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/22-2-300x99.png 300w\" sizes=\"auto, (max-width: 585px) 100vw, 585px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7for\u5faa\u73af\u663e\u793a\u6307\u5b9a\u76ee\u5f55\u4e0b\u7684\u6240\u6709\u6587\u4ef6\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"597\" height=\"189\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/23-2.png\" alt=\"\" class=\"wp-image-1433\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/23-2.png 597w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/23-2-300x95.png 300w\" sizes=\"auto, (max-width: 597px) 100vw, 597px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">for \u5faa\u73af\u53ef\u4ee5\u63a5\u53d7\u4ece\u547d\u4ee4\u884c\u4f20\u9012\u53c2\u6570\uff0c$#\u8868\u793a\u53c2\u6570\u4e2a\u6570\uff0c$*\u8868\u793a\u6240\u6709\u53c2\u6570\uff0c\u6267\u884c\u7684\u65f6\u5019\uff0csh for.sh  1 2 3 4 5\u5373\u53ef\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"599\" height=\"216\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/24-2.png\" alt=\"\" class=\"wp-image-1434\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/24-2.png 599w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/24-2-300x108.png 300w\" sizes=\"auto, (max-width: 599px) 100vw, 599px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center has-vivid-purple-color has-very-light-gray-background-color has-text-color has-background has-medium-font-size wp-block-paragraph\"><strong>\u4e0d\u5e26\u5217\u8868for\u5faa\u73af<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0d\u5e26\u5217\u8868for\u5faa\u73af\u540c\u6837\u901a\u8fc7\u547d\u4ee4\u884c\u6765\u4f20\u9012\u53c2\u6570\uff0csh for.sh 1 2 3\u5982\u56fe:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"590\" height=\"176\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/25-1.png\" alt=\"\" class=\"wp-image-1435\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/25-1.png 590w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/25-1-300x89.png 300w\" sizes=\"auto, (max-width: 590px) 100vw, 590px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center has-vivid-purple-color has-text-color has-medium-font-size wp-block-paragraph\"><strong>\u7c7b\u4f3cC\u8bed\u8a00\u98ce\u683c\u7684for\u5faa\u73af<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> \u7c7b\u4f3cC\u8bed\u8a00\u98ce\u683c\u7684for\u5faa\u73af\u4e5f\u88ab\u6210\u4e3a\u8ba1\u6b21\u5faa\u73af\uff0c\u4e00\u822c\u7528\u4e8e\u5df2\u77e5\u6b21\u6570\u7684\u5faa\u73af\uff0c\u4f8b\u5982\uff1a\u5982\u679c\u6ee1\u8db3i&lt;=5\uff0c\u90a3\u4e48\u7ee7\u7eed\u6267\u884c\u5faa\u73af\u4f53\uff0c\u5426\u5219\u9000\u51fa\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"594\" height=\"199\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/26-2.png\" alt=\"\" class=\"wp-image-1436\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/26-2.png 594w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/26-2-300x101.png 300w\" sizes=\"auto, (max-width: 594px) 100vw, 594px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7c\u98ce\u683c\u7684for\u5faa\u73af\uff0c\u8ba1\u7b971\u5230100\u4e4b\u95f4\u7684\u5947\u6570\u7684\u548c\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"594\" height=\"254\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/27-2.png\" alt=\"\" class=\"wp-image-1437\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/27-2.png 594w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/27-2-300x128.png 300w\" sizes=\"auto, (max-width: 594px) 100vw, 594px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u4ee5\u901a\u8fc7\u9017\u53f7\u8fd0\u7b97\u7b26\u540c\u65f6\u5bf9\u4e24\u4e2a\u53d8\u91cf\u8fdb\u884c\u64cd\u4f5c\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"596\" height=\"204\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/28-2.png\" alt=\"\" class=\"wp-image-1438\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/28-2.png 596w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/28-2-300x103.png 300w\" sizes=\"auto, (max-width: 596px) 100vw, 596px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-purple-color\">if\u5faa\u73af<\/mark><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1\u3001\u4e0b\u9762\u7684if\u5faa\u73af\u6765\u5224\u65ad\u6587\u4ef6\u540e\u7f00\u540d\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"696\" height=\"229\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2024\/03\/8.jpg\" alt=\"\" class=\"wp-image-16220\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2024\/03\/8.jpg 696w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2024\/03\/8-300x99.jpg 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2024\/03\/8-600x197.jpg 600w\" sizes=\"auto, (max-width: 696px) 100vw, 696px\" \/><\/figure>\n\n\n\n<p class=\"has-luminous-vivid-amber-background-color has-background wp-block-paragraph\">\u6ce8\uff1a\u83b7\u53d6\u540e\u7f00\u540d\u7684\u65b9\u5f0f\u662f${a##*.}\uff0ca\u8868\u793a\u6e90\u6587\u4ef6<\/p>\n\n\n\n<p class=\"has-text-align-center has-vivid-purple-color has-text-color has-medium-font-size wp-block-paragraph\"><strong>while\u5faa\u73af<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">while\u5faa\u73af\u4e3b\u8981\u5224\u65adwhile\u540e\u9762\u7684\u8868\u8fbe\u5f0f\u662f\u5426\u6210\u7acb\uff0c\u5982\u679c\u6210\u7acb\uff0c\u5219\u6267\u884c\u5faa\u73af\u4f53\uff0c\u5426\u5219\u9000\u51fa<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">while\u5faa\u73af\u5206\u4e3a\u56db\u79cd\u5f62\u5f0f\uff0c\u5206\u522b\u8bf4\u660e\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p class=\"has-vivid-purple-color has-text-color wp-block-paragraph\"><strong>\u7b2c\u4e00\u79cd\uff1a\u8ba1\u6570\u5668\u63a7\u5236\u7684while\u5faa\u73af<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528\u8ba1\u6570\u5668\u63a7\u5236\uff0c\u7528\u4e8e\u663e\u793a\u6570\u5b571\u52305.\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"596\" height=\"221\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/29-1.png\" alt=\"\" class=\"wp-image-1439\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/29-1.png 596w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/29-1-300x111.png 300w\" sizes=\"auto, (max-width: 596px) 100vw, 596px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7\u8ba1\u6570\u5668\u8ba1\u7b971\u5230100\u4e4b\u95f4\u5947\u6570\u7684\u548c\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"598\" height=\"247\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/21-2.png\" alt=\"\" class=\"wp-image-1463\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/21-2.png 598w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/21-2-300x124.png 300w\" sizes=\"auto, (max-width: 598px) 100vw, 598px\" \/><\/figure>\n\n\n\n<p class=\"has-vivid-purple-color has-text-color wp-block-paragraph\"><strong>\u7b2c\u4e8c\u79cd\uff1a\u7ed3\u675f\u6807\u8bb0\u63a7\u5236\u7684while\u5faa\u73af<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528\u7ed3\u675f\u6807\u8bb0\u63a7\u5236\u7684while\u5faa\u73af\u5b9e\u73b0\u731c\u6d4b1-10\u4e4b\u95f4\u7684\u6570\uff0c\u901a\u8fc7read\u8bfb\u53d6\u8f93\u5165\u6570\u5b57\uff0c\u4e2d\u95f4\u53c8\u52a0\u4e86\u4e00\u4e2a\u5224\u65ad\uff0c\u5982\u679c\u5927\u4e8e10\u5219\u62a5\u9519\u5e76\u9000\u51fa\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"605\" height=\"509\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/2.png\" alt=\"\" class=\"wp-image-1446\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/2.png 605w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/2-300x252.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/2-600x505.png 600w\" sizes=\"auto, (max-width: 605px) 100vw, 605px\" \/><\/figure>\n\n\n\n<p class=\"has-pale-cyan-blue-background-color has-background wp-block-paragraph\">\u6ce8\u610f\uff1awhile\u4e0e[]\u4e4b\u95f4\u6709\u7a7a\u683c<\/p>\n\n\n\n<p class=\"has-vivid-purple-color has-text-color wp-block-paragraph\"><strong>\u7b2c\u4e09\u79cd\uff1a\u6807\u5fd7\u63a7\u5236\u7684for\u5faa\u73af<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528\u6807\u5fd7\u63a7\u5236\u7684for\u5faa\u73af\u5b9e\u73b0\u731c\u6d4b1-10\u4e4b\u95f4\u6570\u5b57\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"599\" height=\"519\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/3.png\" alt=\"\" class=\"wp-image-1449\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/3.png 599w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/3-300x260.png 300w\" sizes=\"auto, (max-width: 599px) 100vw, 599px\" \/><\/figure>\n\n\n\n<p class=\"has-vivid-purple-color has-text-color wp-block-paragraph\"><strong>\u7b2c\u56db\u79cd\uff1a\u547d\u4ee4\u884c\u63a7\u5236\u7684while\u5faa\u73af<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u6b64\u6a21\u5f0f\u4e0b\uff0cwhile\u5faa\u73af\u901a\u5e38\u9700\u8981\u4e0eshift\u4e00\u8d77\u4f7f\u7528\uff0cshift\u4f7f\u4f4d\u7f6e\u53d8\u91cf\u4e0b\u79fb\u4e00\u4f4d($2\u4ee3\u66ff$1,$3\u4ee3\u66ff$2), \u52a0\u4e86shift\u540e\uff0c\u4e0b\u4e00\u8f6e\u5faa\u73af\u5c06\u6253\u5370$2,\u4ee5\u6b64\u7c7b\u63a8\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"588\" height=\"248\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/4.png\" alt=\"\" class=\"wp-image-1450\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/4.png 588w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/4-300x127.png 300w\" sizes=\"auto, (max-width: 588px) 100vw, 588px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">while\u5faa\u73af\u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\u5e76\u8f93\u51fa\u5230\u53e6\u4e00\u6587\u4ef6\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"568\" height=\"171\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2021\/11\/12.png\" alt=\"\" class=\"wp-image-5355\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2021\/11\/12.png 568w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2021\/11\/12-300x90.png 300w\" sizes=\"auto, (max-width: 568px) 100vw, 568px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center has-medium-font-size wp-block-paragraph\"><strong>until\u5faa\u73af<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">until\u5faa\u73af\u4e0ewhile\u5faa\u73af\u7c7b\u4f3c\uff0c\u4f46\u662f\u6709\u4e00\u70b9\u533a\u522b\u5c31\u662f\uff0c\u53ea\u6709\u5f53\u8868\u8fbe\u5f0f\u9000\u51fa\u72b6\u6001\u4e0d\u4e3a0\u7684\u65f6\u5019\uff0c\u5faa\u73af\u4f53\u6267\u884c\uff0c\u5982\u679c\u8868\u8fbe\u5f0f\u9000\u51fa\u72b6\u6001\u4e3a0\uff0c\u5faa\u73af\u7ed3\u675f<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"592\" height=\"234\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/5.png\" alt=\"\" class=\"wp-image-1451\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/5.png 592w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/5-300x119.png 300w\" sizes=\"auto, (max-width: 592px) 100vw, 592px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7until\u540c\u6837\u53ef\u4ee5\u5b9e\u73b0\u731c\u6d4b1-10\u4e4b\u95f4\u7684\u6570\u5b57\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"593\" height=\"462\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/6.png\" alt=\"\" class=\"wp-image-1452\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/6.png 593w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/6-300x234.png 300w\" sizes=\"auto, (max-width: 593px) 100vw, 593px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center has-vivid-purple-color has-text-color has-medium-font-size wp-block-paragraph\"><strong>\u5d4c\u5957\u5faa\u73af<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528\u4e24\u4e2afor\u5faa\u73af\u5d4c\u5957\u5b9e\u73b0\u4e5d\u4e5d\u4e58\u6cd5\u8868\uff0c\u6700\u540e\u7684echo &#8220;&#8221;\u8868\u793a\u6362\u884c\u8f93\u51fa\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"596\" height=\"261\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/7.png\" alt=\"\" class=\"wp-image-1454\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/7.png 596w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/7-300x131.png 300w\" sizes=\"auto, (max-width: 596px) 100vw, 596px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">for\u5faa\u73af\u3001while\u90fd\u652f\u6301\u5d4c\u5957\u5faa\u73af\uff0c\u53ef\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u5d4c\u5957\u4f7f\u7528\u3002<\/p>\n\n\n\n<p class=\"has-text-align-center has-vivid-purple-color has-text-color has-medium-font-size wp-block-paragraph\"><strong>\u5faa\u73af\u63a7\u5236\u7b26<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u6267\u884c\u5faa\u73af\u8fc7\u7a0b\u4e2d\uff0c\u5982\u679c\u9700\u8981\u7acb\u5373\u9000\u51fa\uff0c\u53ef\u4ee5\u901a\u8fc7break\u63a7\u5236\u7b26\uff0c\u5982\u679c\u9000\u51fa\u5f53\u524d\u5faa\u73af\u540e\u7ee7\u7eed\u5faa\u73af\uff0c\u90a3\u4e48\u4f7f\u7528continue\u63a7\u5236\u7b26<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">break\u5faa\u73af\u63a7\u5236\u7b26\u53ef\u4ee5\u7528\u4e8efor\u5faa\u73af\u3001while\u5faa\u73af\u4ee5\u53cauntil\u5faa\u73af\u4e2d\uff0c\u7528\u4e8e\u5f3a\u884c\u9000\u51fa\u5faa\u73af\uff0c\u5ffd\u7565\u5faa\u73af\u8bed\u53e5\u4e2d\u5176\u4ed6\u6761\u4ef6\u9650\u5236\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\uff1a\u8ba1\u7b971-100\u4e4b\u95f4\u6570\u7684\u548c\uff0c\u5f53\u603b\u548c\u5927\u4e8e1000\u7684\u65f6\u5019\uff0c\u505c\u6b62\u5faa\u73af\uff0c\u5e76\u6253\u5370\u603b\u548c\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"240\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/8.png\" alt=\"\" class=\"wp-image-1455\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/8.png 600w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/8-300x120.png 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">continue\u5faa\u73af\u63a7\u5236\u7b26\u4e5f\u53ef\u4ee5\u7528\u4e8efor\u5faa\u73af \u3001while\u5faa\u73af\u4ee5\u53cauntil\u5faa\u73af\u4e2d\uff0c\u7528\u4e8e\u8ba9\u811a\u672c\u8df3\u8fc7\u540e\u9762\u7684\u5faa\u73af\uff0c\u7ee7\u7eed\u6267\u884c\u4e0b\u4e00\u6b21\u5faa\u73af\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\uff1a\u901a\u8fc7continue\u5b9e\u73b0\u6253\u5370100\u4ee5\u5185\u80fd\u88ab7\u6574\u9664\u7684\u6570\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"597\" height=\"368\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/9-1.png\" alt=\"\" class=\"wp-image-1456\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/9-1.png 597w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2020\/05\/9-1-300x185.png 300w\" sizes=\"auto, (max-width: 597px) 100vw, 597px\" \/><\/figure>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-purple-color\">\u5faa\u73af\u5360\u4f4d\u7b26<\/mark><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5360\u4f4d\u7b26\u7684\u610f\u601d\u5c31\u662f\u5360\u7740\u4f4d\u7f6e\uff0c\u4f46\u662f\u4ec0\u4e48\u4e5f\u4e0d\u505a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1\u3001\u4e0b\u9762\u4f8b\u5b50\u8868\u793a\u4e00\u4e2aif\u5faa\u73af\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"695\" height=\"242\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/2-4.jpg\" alt=\"\" class=\"wp-image-15943\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/2-4.jpg 695w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/2-4-300x104.jpg 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/2-4-600x209.jpg 600w\" sizes=\"auto, (max-width: 695px) 100vw, 695px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u56fe\u4e2d if \u548c elif \u6761\u4ef6\u90fd\u4e0d\u6ee1\u8db3\uff0c\u56e0\u6b64\u53ea\u80fd\u6267\u884celse\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"696\" height=\"58\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/3-4.jpg\" alt=\"\" class=\"wp-image-15944\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/3-4.jpg 696w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/3-4-300x25.jpg 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/3-4-600x50.jpg 600w\" sizes=\"auto, (max-width: 696px) 100vw, 696px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u65f6\uff0c\u5982\u679c\u6211\u4eec\u4e0d\u60f3\u8ba9else\u4e2d\u7684\u5185\u5bb9\u6267\u884c\uff0c\u8981else\uff0c\u4f46\u662f\u4ec0\u4e48\u4e5f\u4e0d\u6267\u884c\uff0c\u6b64\u65f6\u53ef\u4ee5\u5c06\u5185\u5bb9\u66ff\u6362\u4e3atrue\u6216\u8005\u5192\u53f7\u6765\u5360\u4f4d\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"692\" height=\"244\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/4-4.jpg\" alt=\"\" class=\"wp-image-15945\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/4-4.jpg 692w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/4-4-300x106.jpg 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2023\/12\/4-4-600x212.jpg 600w\" sizes=\"auto, (max-width: 692px) 100vw, 692px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>for\u5faa\u73af\u6709\u4e09\u79cd\u683c\u5f0f\uff0c\u7b2c\u4e00\u79cd\u662f\u5217\u8868for\u5faa\u73af\uff0c\u4e00\u79cd\u662f\u4e0d\u5e26\u5217\u8868\u7684for\u5faa\u73af\uff0c\u7b2c\u4e09\u79cd\u662f\u7c7b\u4f3cC\u8bed\u8a00\u98ce\u683c\u7684for\u5faa\u73af\u3002 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":1458,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37,29],"tags":[53],"class_list":["post-1426","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-shell","category-yunwei","tag-shell"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":8}},"_links":{"self":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts\/1426","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1426"}],"version-history":[{"count":14,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts\/1426\/revisions"}],"predecessor-version":[{"id":16221,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts\/1426\/revisions\/16221"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/media\/1458"}],"wp:attachment":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1426"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1426"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1426"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}