{"id":162300,"date":"2019-11-20T12:00:34","date_gmt":"2019-11-20T04:00:34","guid":{"rendered":"https:\/\/lrxjmw.cn\/?p=162300"},"modified":"2019-10-23T15:01:17","modified_gmt":"2019-10-23T07:01:17","slug":"shells-while-statement","status":"publish","type":"post","link":"https:\/\/lrxjmw.cn\/shells-while-statement.html","title":{"rendered":"Shell \u4e4b while \u8bed\u53e5"},"content":{"rendered":"<table>\n<tbody>\n<tr>\n<td style=\"padding: 5px 12px; width: 25px; font-size: 22px; text-align: center; background: #E8E8E8; line-height: 30px; color: #999;\">\u5bfc\u8bfb<\/td>\n<td style=\"padding: 10px 10px 12px; line-height: 20px;\"><strong>while\u5faa\u73af\u7528\u4e8e\u4e0d\u65ad\u6267\u884c\u4e00\u7cfb\u5217\u547d\u4ee4\uff0c\u4e5f\u7528\u4e8e\u4ece\u8f93\u5165\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e\uff1b\u547d\u4ee4\u901a\u5e38\u4e3a\u6d4b\u8bd5\u6761\u4ef6\u3002<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter  wp-image-162303\" src=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/10\/777.jpg\" alt=\"\" width=\"632\" height=\"415\" srcset=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/10\/777.jpg 314w, https:\/\/lrxjmw.cn\/wp-content\/uploads\/2019\/10\/777-300x198.jpg 300w\" sizes=\"auto, (max-width: 632px) 100vw, 632px\" \/><\/p>\n<p><strong>while\u5faa\u73af\u683c\u5f0f\u4e3a\uff1a<\/strong><\/p>\n<pre>while condition\r\ndo\r\n    command\r\ndone<\/pre>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u57fa\u672c\u7684while\u5faa\u73af\uff0c\u6d4b\u8bd5\u6761\u4ef6\u662f\uff1a\u5982\u679cint\u5c0f\u4e8e\u7b49\u4e8e5\uff0c\u90a3\u4e48\u6761\u4ef6\u8fd4\u56de\u771f\u3002int\u4ece0\u5f00\u59cb\uff0c\u6bcf\u6b21\u5faa\u73af\u5904\u7406\u65f6\uff0cint\u52a01\u3002\u8fd0\u884c\u4e0a\u8ff0\u811a\u672c\uff0c\u8fd4\u56de\u6570\u5b571\u52305\uff0c\u7136\u540e\u7ec8\u6b62\u3002<\/p>\n<pre>#!\/bin\/bash\r\nint=1\r\nwhile(( $int< =5 ))\r\ndo\r\n    echo $int\r\n    let \"int++\"\r\ndone<\/pre>\n<p>\u8fd0\u884c\u811a\u672c\uff0c\u8f93\u51fa\uff1a<\/p>\n<pre>1\r\n2\r\n3\r\n4\r\n5<\/pre>\n<p>\u4ee5\u4e0a\u5b9e\u4f8b\u4f7f\u7528\u4e86 Bash let \u547d\u4ee4\uff0c\u5b83\u7528\u4e8e\u6267\u884c\u4e00\u4e2a\u6216\u591a\u4e2a\u8868\u8fbe\u5f0f\uff0c\u53d8\u91cf\u8ba1\u7b97\u4e2d\u4e0d\u9700\u8981\u52a0\u4e0a $ \u6765\u8868\u793a\u53d8\u91cf\uff0c\u5177\u4f53\u53ef\u67e5\u9605\uff1aBash let \u547d\u4ee4<\/p>\n<p>\u3002<br \/>\nwhile\u5faa\u73af\u53ef\u7528\u4e8e\u8bfb\u53d6\u952e\u76d8\u4fe1\u606f\u3002\u4e0b\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u8f93\u5165\u4fe1\u606f\u88ab\u8bbe\u7f6e\u4e3a\u53d8\u91cfFILM\uff0c\u6309<ctrl -D>\u7ed3\u675f\u5faa\u73af\u3002<\/p>\n<pre>echo '\u6309\u4e0b <ctrl -D> \u9000\u51fa'\r\necho -n '\u8f93\u5165\u4f60\u6700\u559c\u6b22\u7684\u7f51\u7ad9\u540d: '\r\nwhile read FILM\r\ndo\r\n    echo \"\u662f\u7684\uff01$FILM \u662f\u4e00\u4e2a\u597d\u7f51\u7ad9\"\r\ndone<\/ctrl><\/pre>\n<p>\u8fd0\u884c\u811a\u672c\uff0c\u8f93\u51fa\u7c7b\u4f3c\u4e0b\u9762\uff1a<\/p>\n<pre>\u6309\u4e0b <ctrl -D> \u9000\u51fa\r\n\u8f93\u5165\u4f60\u6700\u559c\u6b22\u7684\u7f51\u7ad9\u540d:\u83dc\u9e1f\u6559\u7a0b\r\n\u662f\u7684\uff01\u83dc\u9e1f\u6559\u7a0b \u662f\u4e00\u4e2a\u597d\u7f51\u7ad9<\/ctrl><\/pre>\n<p><strong>\u65e0\u9650\u5faa\u73af<\/strong><\/p>\n<p>\u65e0\u9650\u5faa\u73af\u8bed\u6cd5\u683c\u5f0f\uff1a<\/p>\n<pre>while :\r\ndo\r\n    command\r\ndone<\/pre>\n<p>\u6216\u8005<\/p>\n<pre>while true\r\ndo\r\n    command\r\ndone<\/pre>\n<p>\u6216\u8005<\/p>\n<pre>for (( ; ; ))<\/pre>\n<p><\/ctrl><\/p>\n","protected":false},"excerpt":{"rendered":"<p>while\u5faa\u73af\u683c\u5f0f\u4e3a\uff1a while condition do command done \u4ee5\u4e0b\u662f\u4e00\u4e2a\u57fa\u672c\u7684whi [&hellip;]<\/p>\n","protected":false},"author":321,"featured_media":162304,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[55],"tags":[],"class_list":["post-162300","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-thread"],"acf":[],"_links":{"self":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/162300","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/users\/321"}],"replies":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/comments?post=162300"}],"version-history":[{"count":4,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/162300\/revisions"}],"predecessor-version":[{"id":162309,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/162300\/revisions\/162309"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/media\/162304"}],"wp:attachment":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/media?parent=162300"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/categories?post=162300"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/tags?post=162300"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}