Simple Calculator

#1

On execution my program is showing no such element exception
CODE-
import java.util.;
public class Main {
public static void main(String args[]) {
Scanner scn = new Scanner(System.in);
char n = scn.next().charAt(0);
while(n != ‘x’||n!=‘X’){
int n1 = scn.nextInt();
int n2 = scn.nextInt();
if(n == ‘+’){
System.out.println(n1+n2);
}else if(n == ‘-’){
System.out.println(n1-n2);
}else if(n ==’’){
System.out.println(n1*n2);
}else if(n ==’/’){
System.out.println(n1/n2);
}else if(n ==’%’){
System.out.println(n1%n2);
}else{
System.out.println(“Invalid operation. Try again.”);
}
n = scn.next().charAt(0);

	}
}

}

#2

@satwik7142,
Simply Put a loop and take input operator and then take input of two digits and then perform the operation till the user inputs ‘x’ or ‘X’.

If n is a non arithmetic symbol in the beginning you directly have to print “try again” instead of taking inputs for n1 and n2.

Only if n is an arithmetic symbol take inputs for n1 and n2.

#3

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