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import java.util.Scanner;

public class switch_cals

{

public static void main(String[] args)

{

Scanner no1 = new Scanner(System.in);

int a = no1.nextInt();

Scanner no2 = new Scanner(System.in);

int b = no2.nextInt();

System.out.println("option :- ");

System.out.println("1.--addtion--");

System.out.println("2.deletion");

System.out.println("3.multiplication");

System.out.println("4.division");

Scanner ch = new Scanner(System.in);

int choice = ch.nextInt();

switch (choice) {

case 1:

int sum = a + b ;

System.out.println("a + b :- " + sum);

break;

case 2:

int del = a - b ;

System.out.println("a - b :- " + del);

break;

case 3:

int mul = a * b ;

System.out.println("a * b :- " + mul);

break;

case 4:

int div = a / b ;

System.out.println("a / b :- " + div);

break;

default:

System.out.println("choose correct number");

break;

}

}

}