What should I do to make the code repet itself until there is no value in ch

#1

import java.util.;
public class Main {
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
char ch = sc.next().charAt(0);
//while(ch!=0){
int a = sc.nextInt();
int b = sc.nextInt();
int result=0;
//do
switch(ch){
case ‘x’:
break;
case ‘X’:
break;
case ‘+’:
result = a+b;
System.out.println(result);
break;
case ‘-’:
result=a-b;
System.out.println(result);
break;
case '’:
result=a*b;
System.out.println(result);
break;
case ‘%’:
result = a%b;
System.out.println(result);
break;
case ‘/’:
result=a/b;
System.out.println(result);
break;
default:
System.out.println("'Invalid operation. Try again");
break;

	}//while(true);
	}

}

}

#2

@mishikasrvastava,
use a do-while loop.

in case the input char is +,-,*,/,% input numbers. In case the input is not x or X print invalid operation. The while loop condition will be:

do
       {

        } while (ch != 'x' && ch != 'X');

also declare ch as char outside the loop, else you might get an error

#3

Exception in thread “main” java.util.InputMismatchException at java.util.Scanner.throwFor(Scanner.java:864) at java.util.Scanner.next(Scanner.java:1485) at java.util.Scanner.nextInt(Scanner.java:2117) at java.util.Scanner.nextInt(Scanner.java:2076) at Main.main(Main.java:7)

#4

how to resolve this error

#5

@mishikasrvastava,
Can you please share your code?

An input mismatch exception usually occurs when you try to store an int input in a char or vice-versa. Basically when the input doesn’t match the variable data type

#6

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#7

2 2 5 Invalid Operation.Try again Invalid Operation.Try again