Looping over an array

for loop:

arr=(a b c d e f)
for i in "${arr[@]}";do
    echo "$i"
done

for ((i=0;i<${#arr[@]};i++));do
    echo "${arr[$i]}" 
done

while loop:

i=0
while [ $i -lt ${#arr[@]} ];do
    echo "${arr[$i]}"
    i=$(expr $i + 1)
done

i=0
while (( $i < ${#arr[@]} ));do
    echo "${arr[$i]}"
    ((i++))
done

Found a mistake? Have a question or improvement idea? Let me know.

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