calculator using switch and while loops in java

/* Create Switch cases */ Scanner sc= new Scanner(System.in); int firstNum= sc.nextInt(); int secondNum= sc.nextInt(); System.out.println("Enter an operator (+, -, *, /):"); char operator= sc.next().chartAt(0); double result=0; switch(operator){ case "+": result+= firstNum+ secondNum; break; case "-": result+= firstNum-secondNum; break; case "*": result+= firstNum*secondNum; break; case "/": result+= firstNum/secondNum; break; }

Java program for a calculator using switch case

import java.util.Scanner;
public class Main
{
public static void main(String[] args) 
{
Scanner reader = new Scanner(System.in);
System.out.print("Enter two numbers");
double first = reader.nextDouble();
double second = reader.nextDouble();
System.out.print("Enter an operators");
char operator = reader.next().charAt(0);
double result;
switch(operator)
{
case '+':
result = first + second;
break;
case '-':
result = first - second;
break;
case '*':
result = first * second;
break;
case '/':
result = first / second;
break;
default:
System.out.printf("operator is correct");
return;
}
System.out.printf("%.1f %c %.1f = %.1f", first, operator, second, result);
}
}

Posted by: Guest on July-03-2021

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