array length bash code example

Example 1: get length of array bash

## define it
distro=("redhat" "debian" "gentoo")
 
## get length of $distro array
len=${#distro[@]}
 
## Use bash for loop 
for (( i=0; i<$len; i++ )); do echo "${distro[$i]}" ; done

Example 2: bash size of array

echo "${#my_array[@]}"

Example 3: bash map lenght

$ declare -A array
$ array[foo]='something'
$ array[bar]='blah'
$ array[42]='nothing'
$ echo ${#array[@]}
3