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Tags: bash   scripts   syntax  
Link: πŸ” See Original Answer on Ask Ubuntu πŸ”—

URL: https://askubuntu.com/q/1054677
Title: What is the point of the bash Null-operator ":", colon?
ID: /2018/07/13/What-is-the-point-of-the-bash-Null-operator-____-colon_
Created: July 13, 2018    Edited:  July 13, 2018
Upload: November 24, 2022    Layout:  post
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You can use it on the positive test of an if command when you only want to do something on the negative side. For example:

if [[ True == False ]]; then
    :
else
    echo "true <> flase"
fi

Without the : bash would generate a syntax error.

This is an oversimplified example. Generally you would use such a technique in preliminary coding when you haven’t written that code segment yet and just need something that doesn’t generate an error.

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