{"id":1869,"date":"2020-11-17T10:42:17","date_gmt":"2020-11-17T10:42:17","guid":{"rendered":"https:\/\/linuxdigest.com\/?p=1869"},"modified":"2020-12-13T17:11:17","modified_gmt":"2020-12-13T17:11:17","slug":"for-loops-in-bash","status":"publish","type":"post","link":"https:\/\/linuxdigest.com\/howto\/for-loops-in-bash\/","title":{"rendered":"For loops in bash"},"content":{"rendered":"\n

You can use for loops in bash just like in any other programing language. The basic syntax is like this:<\/p>\n\n\n\n

for variable-name in 1 2 3\ndo\n  list-of-commands\ndone\n<\/code><\/pre>\n\n\n\n
One line for loop in bash<\/h2>\n\n\n\n
To do a quick one-liner with for, we use a semicolon to separate each line. In this example, we will give for a list of 4 items to iterate through.<\/p>\n\n\n\n
~$ for i in 1 2 3 4; do echo \"This is line number $i\"; done;\nThis is line number 1\nThis is line number 2\nThis is line number 3\nThis is line number 4\n<\/code><\/pre>\n\n\n\n
For loop in a bash script<\/h2>\n\n\n\n
When writing a script. We don’t need to use the semicolon as in the example above. This time we write each part of the command on a separate line. This example will print exactly the same output as the one-liner we just did.<\/p>\n\n\n\n
for i in 1 2 3 4\ndo\n        echo \"This is line number $i\"\ndone<\/code><\/pre>\n\n\n\n
Use a command to get a list of items<\/h2>\n\n\n\n
Instead of giving for a long list of items to iterate through, we can also wrap a command in $( ) to get the list. In this example we use the seq command to get a list of numbers 1 through 4. This will output exactly the same as above.<\/p>\n\n\n\n
for i in $( seq 1 4 )\ndo\n        echo \"This is line number $i\"\ndone\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
You can use for loops in bash just like in any other programing language. The basic…<\/p>\n","protected":false},"author":1,"featured_media":1919,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[1],"tags":[],"yoast_head":"\nFor loops in bash - Linux Digest<\/title>\n<meta name=\"description\" content=\"The simple way to learn bash for loops.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/linuxdigest.com\/howto\/for-loops-in-bash\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"For loops in bash - Linux Digest\" \/>\n<meta property=\"og:description\" content=\"The simple way to learn bash for loops.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/linuxdigest.com\/howto\/for-loops-in-bash\/\" \/>\n<meta property=\"og:site_name\" content=\"Linux Digest\" \/>\n<meta property=\"article:published_time\" content=\"2020-11-17T10:42:17+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-12-13T17:11:17+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/linuxdigest.com\/wp-content\/uploads\/2020\/11\/Copy-of-Untitled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"900\" \/>\n\t<meta property=\"og:image:height\" content=\"700\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"The Linux Digest Guy\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"The Linux Digest Guy\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/linuxdigest.com\/howto\/for-loops-in-bash\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/linuxdigest.com\/howto\/for-loops-in-bash\/\"},\"author\":{\"name\":\"The Linux Digest Guy\",\"@id\":\"https:\/\/linuxdigest.com\/#\/schema\/person\/29c97230aa94affab929a88c6a10adb2\"},\"headline\":\"For loops in bash\",\"datePublished\":\"2020-11-17T10:42:17+00:00\",\"dateModified\":\"2020-12-13T17:11:17+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/linuxdigest.com\/howto\/for-loops-in-bash\/\"},\"wordCount\":163,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/linuxdigest.com\/#organization\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/linuxdigest.com\/howto\/for-loops-in-bash\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/linuxdigest.com\/howto\/for-loops-in-bash\/\",\"url\":\"https:\/\/linuxdigest.com\/howto\/for-loops-in-bash\/\",\"name\":\"For loops in bash - 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