Solved armstrong-numbers in Bash

bash/armstrong-numbers/armstrong_numbers.sh

@@ -0,0 +1,20 @@
+#!/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