31 lines
437 B
Markdown
31 lines
437 B
Markdown
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---
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categories:
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- Programming Languages
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tags:
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- shell
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- data-types
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---
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# Strings in bash
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## Return a substring by index
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```bash
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myString="hello"
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substring=${myString:0:3}
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# hel
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```
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This is often used when looping through each character in a string.
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## Loop through each character in a string
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```bash
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str="hallelujah"
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stringLength=$(expr length str)
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for (( i=0; i<=${stringLength}; i++ )); do
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echo "${str:$i:1}"
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done
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```
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