Add GCD, LCM and main scripts

script_LCM.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+# script_LCM.sh
+
+gcd() {
+    a=$1
+    b=$2
+    while [ $b -ne 0 ]; do
+        temp=$b
+        b=$((a % b))
+        a=$temp
+    done
+    echo $a
+}
+
+lcm() {
+    a=$1
+    b=$2
+    gcd_val=$(gcd $a $b)
+    echo $((a * b / gcd_val))
+}
+
+lcm $1 $2