Thread: Switch statement question

Hi guys . what's up

Actually I have a question concernig switch statement that I tried to solve but I couldn't

The question is :

Write a program using switch case statement that simulates a calculator and that program will provide the basic integer arithmetic operations such as +, -, *, and /. The output of the program is shown as below:


Enter first number :4
Enter second number :5
CHOICE OF CALCULATION
'+' :plus
'-' :Minus
'*' :Multiply
'/' :division
Enter your choice :*
The answer is 20

Quick search in google gave me this

The switch Statement (The Java™ Tutorials > Learning the Java Language > Language Basics)

In the example above they switch an integer. In your case I would suggest creating char and switch it:

int firstNumber;
int secondNumber;
char operation;
//TODO: read character from the input
switch(operation) {
    case '+':
        System.out.println("The answer is" + (firstNumber + secondNumber));
        break;
    case '-':
        System.out.println("The answer is" + (firstNumber - secondNumber));
        break;
    default:
        System.out.println("Unknown operator used..");
        break;
}

You asked how does switch operation work.
I explained it to you. However there are things you need to do yourself, you need to read firstNumber, secondNumber and operation character before you switch. I didn't do your whole asignement because it's YOURS job to do.

Take a look at this SwitchExample class I made.

public class SwitchExample {
 
	public static void main(String[] args){
		int firstNumber = 2;
		int secondNumber = 1;
 
		//you can change operation to + or -
		char operation = '+';
 
		switch(operation) {
		    case '+':
		        System.out.println("The answer is " + (firstNumber + secondNumber));
		        break;
		    case '-':
		        System.out.println("The answer is " + (firstNumber - secondNumber));
		        break;
		    default:
		        System.out.println("Unknown operator used..");
		        break;
		}
	}
 
}