calc.java

import java.util.*;

public class calc{
	public static void main(String[] args){
		float a,b,res;
		char choice,ch;		
		Scanner scan = new Scanner(System.in);
		
		do{
			System.out.print("1. ADD TWO Numbers\n");
			System.out.print("2. Exit\n\n");
			System.out.print("3. SUBTRACT\n");
			System.out.print("4. multiply TWO Numbers\n");
			System.out.print("Enter choice: ");
			choice = scan.next().charAt(0);
			
			switch(choice){
				case '1':System.out.print("Enter two numbers");
					 a = scan.nextFloat();
					 b = scan.nextFloat();
					 res = a + b;
					 System.out.print("Result = " + res);
					 break;
				case '3':System.out.print("Enter two numbers");
					 a = scan.nextFloat();
					 b = scan.nextFloat();
					 res = a - b;
					 System.out.print("Result = " + res);
					 break;

				 case '2' :System.exit(0);
						break;
				
				 default: System.out.print("Invalid choice");
					  break;
			}
			System.out.print("\n-------------------------\n");
		}while(choice !=2);					  				
	}
}