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34 lines
1023 B
Plaintext
34 lines
1023 B
Plaintext
---
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syntax: markdown
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tags: [tldr, common]
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source: https://github.com/tldr-pages/tldr.git
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---
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# for
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> Perform a command several times.
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> More information: <https://www.gnu.org/software/bash/manual/bash.html#Looping-Constructs>.
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- Iterate through command line parameters:
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`for {{variable}}; do {{echo $variable}}; done`
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- Execute the given commands for each of the specified items:
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`for {{variable}} in {{item1 item2 ...}}; do {{echo "Loop is executed"}}; done`
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- Iterate over a given range of numbers:
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`for {{variable}} in {{{from..to..step}}}; do {{echo "Loop is executed"}}; done`
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- Iterate over a given list of files:
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`for {{variable}} in {{path/to/file1 path/to/file2 ...}}; do {{echo "Loop is executed"}}; done`
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- Iterate over a given list of directories:
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`for {{variable}} in {{path/to/directory1/ path/to/directory2/ ...}}; do {{echo "Loop is executed"}}; done`
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- Perform a given command in every directory:
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`for {{variable}} in */; do (cd "${{variable}}" || continue; {{echo "Loop is executed"}}) done`
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