#!/usr/bin/env bash number="$1" # Convert number to string to get the number of digits num_str="${number}" num_digits="${#num_str}" sum=0 for (( i=0; i<${num_digits}; i++ )); do # Extract the i-th digit from the number digit="${num_str:$i:1}" sum=$((sum + digit ** num_digits)) done if (( sum == number )); then echo "true" else echo "false" fi