Basic scripting is done

function.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+
+function addition {
+    local FIRST=$1
+    local SECOND=$2
+
+    let RESULT=FIRST+SECOND
+    echo "Result is: $RESULT"
+    let FIRST++
+    let SECOND++
+    return $RESULT
+}
+
+#do the addition of two numbers
+echo -n "Enter first number: "
+read FIRST
+echo -n "Enter second number: "
+read SECOND
+addition $FIRST $SECOND
+
+echo "RETURN: $?"
+echo "Printing variable:"
+echo "FIRST: $FIRST"
+echo "SECOND: $SECOND"