{"id":12790,"date":"2024-03-14T16:37:09","date_gmt":"2024-03-14T16:37:09","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-does-the-shell-determine-if-a-string-is-in-a-list\/"},"modified":"2025-08-05T07:00:07","modified_gmt":"2025-08-05T07:00:07","slug":"how-does-the-shell-determine-if-a-string-is-in-a-list","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-does-the-shell-determine-if-a-string-is-in-a-list\/","title":{"rendered":"Check String in List Bash"},"content":{"rendered":"<p>To determine if a string is in a list in a shell script, you can use a loop to iterate through the list and check for the string.<\/p>\n<p>Here is an example code:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta prompt_\">#<\/span><span class=\"language-bash\">!\/bin\/bash<\/span>\r\n<span class=\"hljs-meta prompt_\">\r\n# <\/span><span class=\"language-bash\">\u5217\u8868<\/span>\r\nlist=(\"apple\" \"banana\" \"orange\" \"grape\")\r\n<span class=\"hljs-meta prompt_\">\r\n# <\/span><span class=\"language-bash\">\u9700\u8981\u5224\u65ad\u7684\u5b57\u7b26\u4e32<\/span>\r\nstr=\"orange\"\r\n<span class=\"hljs-meta prompt_\">\r\n# <\/span><span class=\"language-bash\">\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u5728\u5217\u8868\u4e2d<\/span>\r\nfound=false\r\nfor item in \"${list[@]}\"; do\r\n    if [ \"$item\" == \"$str\" ]; then\r\n        found=true\r\n        break\r\n    fi\r\ndone\r\n<span class=\"hljs-meta prompt_\">\r\n# <\/span><span class=\"language-bash\">\u8f93\u51fa\u7ed3\u679c<\/span>\r\nif [ \"$found\" == true ]; then\r\n    echo \"\u5b57\u7b26\u4e32 '$str' \u5728\u5217\u8868\u4e2d\"\r\nelse\r\n    echo \"\u5b57\u7b26\u4e32 '$str' \u4e0d\u5728\u5217\u8868\u4e2d\"\r\nfi\r\n<\/code><\/pre>\n<p>In the above sample code, a list is first defined, followed by a string that needs to be checked. Next, a for loop is used to iterate through the list, comparing each element with the string to determine if a matching string is found. If a match is found, the &#8220;found&#8221; variable is set to true and the loop is exited. Finally, the result is output based on the value of the &#8220;found&#8221; variable.<\/p>\n<p>Running the above code will output the string &#8216;orange&#8217; is in the list. If the str variable is changed to a string that is not in the list, the output will be the string &#8216;xxx&#8217; is not in the list.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>To determine if a string is in a list in a shell script, you can use a loop to iterate through the list and check for the string. Here is an example code: #!\/bin\/bash # \u5217\u8868 list=(&#8220;apple&#8221; &#8220;banana&#8221; &#8220;orange&#8221; &#8220;grape&#8221;) # \u9700\u8981\u5224\u65ad\u7684\u5b57\u7b26\u4e32 str=&#8221;orange&#8221; # \u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u5728\u5217\u8868\u4e2d found=false for item in &#8220;${list[@]}&#8221;; do if [ &#8220;$item&#8221; == [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[16842,16840,16843,16841,3503],"class_list":["post-12790","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-bash-list-contains-string","tag-bash-string-in-list","tag-bash-tutorial","tag-check-string-in-list","tag-shell-scripting"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Check String in List Bash - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn to check if a string exists in Bash lists using loops. 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