for loop

[oceanMIH]

for ((i=0;i<${#arr[@]};i++)); do
printf '%s\n' "${arr[i]}"
done

the above code may be wrong if the array is not contiuous, or there are holes in the array
for example:
arr=(apple [3]=banana [6]=cherry)

[andry81]

You can recreate array:

arr2=("${arr[@]}")

[oceanMIH]

You can recreate array:

arr2=("${arr[@]}")

yes, thanx
I think the following is better:
for i in ${!arr[@]}; do
printf '%s\n' "${arr[i]}"
done

[MegaV0lt]

Also should work without loop:

printf '%s\n' "${arr[@]}"