Bash for loop test multiple variables are empty function?

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Bash for loop test multiple variables are empty function?

Erna Thompson · Accepted Answer

If the length of STRING is zero, variable ($var) is empty. The test command is used to check file types and compare values. This page shows how to find out if a bash shell variable is empty or not using the test command. Return true if a bash variable is unset or set to the empty string: if [ -z "$var" ];

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