How To Check If A Array Is Empty In Bash

How to check if a array is empty in Bash

In this post we will give you information about How to check if a array is empty in Bash. Hear we will give you detail about How to check if a array is empty in BashAnd how to use it also give you demo for it if it is necessary.

we are going to learn about how to check if a array is empty or not in Bash.

Checking array is empty

To check if a array is empty or not, we can use the arithmetic expansion syntax (( )) in Bash.

Here is an example:

arr=()if ((${#arr[@]})); then  echo "array is not empty"else  echo  "array is empty"fi

Output:

"array is empty"

or we can also check it like this:

arr=()if [ ${#arr[@]} -gt 0 ]; then  echo "array is not empty"else  echo  "array is empty"fi

In the example above, this syntax ${#arr[@]} returns the total number of elements in an array.

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