In this post you will learn Basic Calculator Operations program by using Java. Basic calculator Operations means additions,subtractions,multiplication and division. To implement this operation i am using Java programming Language. The following code will help to implement calculator operations.




package seleniumsession1;

import java.util.Scanner;

public class CalculatorDemo {

public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
System.out.print("enter two numbers");
double first=sc.nextDouble();
double second=sc.nextDouble();
System.out.println("enter an operator(+,-,*,/):");
char ch=sc.next().charAt(0);
double result;

switch(ch) {
case '+':
      result=first+second;
      break;
case '-':
      result=first-second;
      break;
case '*':
      result=first*second;
      break;
case '/':
      result=first/second;
      break;
   default:
           System.out.println("incorrect operator");
           return;
}
System.out.printf("%.1f %c %.1f = %.1f", first, ch, second, result);


}

}

Output:
Enter two numbers:

100  200

enter any operator:
+
100.0+200.0=300.0