feat: Implement menu-driven arithmetic calculator using switch-case and string input

🧠 Logic:
- Displays a menu with options: ADD, SUB, MUL, DIV.
- Takes two integer inputs from the user.
- Reads arithmetic operation as a string and converts it to uppercase for case-insensitive comparison.
- Uses a `switch-case` on the entered option to:
  - Perform addition, subtraction, multiplication, or division.
  - Print the corresponding result.
- If the input is invalid, it shows an "Invalid Option" message.

Signed-off-by: Somesh diwan <[email protected]>

Author: Someshdiwan

Section7ConditionalStatements/src/SwitchCasesIMPAB.java

@@ -26,8 +26,7 @@ public static void main(String[] args) {
         String option=sc.nextLine();
         option=option.toUpperCase();
 
-        switch(option)
-        {
+        switch(option) {
             case "ADD": System.out.println("Sum is "+(x+y));
                 break;
             case "SUB": System.out.println("Difference is "+(x-y));
@@ -36,9 +35,8 @@ public static void main(String[] args) {
                 break;
             case "DIV": System.out.println("Ratio is "+(x/y));
                 break;
-            default:     System.out.println("Invalid Option");
+            default:    System.out.println("Invalid Option");
                 break;
         }
     }
 }
-