**Simple calculator program in java using switch case: **Enhancing programming skills is very important no matter what language you have chosen. So, practice frequently with these simple java programs examples and excel in coding the complex logic.

## Program to Make a Simple Calculator Using switch-case

**Java programs calculator: **In this article we will make simple calculator using `switch case`

statement.

Let’s first see the approach of the program.

**Approach:**

- First take two numbers input from the user means two operands, upon which the calculation will be performed.
- Store two numbers in double variables
`operand1`

and`operand2`

respectively. - After taking two operands input now take the operator input from the user, means which operation will be performed.
- As operator input the user has to give either one operator among
`+`

(addition),`-`

(subtraction),`*`

(multiplication),`/`

(division). And store it in character variable`operator`

. - Now according to the case(operator symbols) perform the respective operation.
- Then produce the result as output and with the help of double variable
`result`

.

Let’s see the below program to understand it more clearly.

**Program:**

import java.util.Scanner; class Main { public static void main(String[] args) { char operator; Double operand1, operand2, result; // Scanner class object created, for user input Scanner sc= new Scanner(System.in); // enter first number System.out.println("Enter first number : "); operand1 = sc.nextDouble(); // enter second number System.out.println("Enter second number : "); operand2 = sc.nextDouble(); // asking for operator user input System.out.println("Choose an operator : +, -, *, or /"); operator = sc.next().charAt(0); switch (operator) { // addition operation case '+': result = operand1+operand2; System.out.println("Result = "+operand1+ " + " +operand2+ " = " + result); break; // subtraction operation case '-': result = operand1-operand2; System.out.println("Result = "+operand1+ " - " +operand2+ " = " + result); break; // multiplication operation case '*': result = operand1*operand2; System.out.println("Result = "+operand1+ " * " +operand2+ " = " + result); break; // division operation case '/': result = operand1/operand2; System.out.println("Result = "+operand1+ " / " +operand2+ " = " + result); break; default: System.out.println("You have entered invalid operator."); break; } System.out.println("THANKS FOR USING BTECHGEEKS CALCULATOR"); sc.close(); } }

Output: CASE-1 ADDITION Enter first number : 605.4 Enter second number : 200 Choose an operator : +, -, *, or / + Result = 605.4 + 200.0 = 805.4 THANKS FOR USING BTECHGEEKS CALCULATOR CASE-2 SUBTRACTION Enter first number : 6789 Enter second number : 2400 Choose an operator : +, -, *, or / - Result = 6789.0 - 2400.0 = 4389.0 THANKS FOR USING BTECHGEEKS CALCULATOR CASE-3 MULTIPLICATION Enter first number : 350 Enter second number : 30 Choose an operator : +, -, *, or / * Result = 350.0 * 30.0 = 10500.0 THANKS FOR USING BTECHGEEKS CALCULATOR CASE-4 DIVISION Enter first number : 24430 Enter second number : 30 Choose an operator : +, -, *, or / / Result = 24430.0 / 30.0 = 814.3333333333334 THANKS FOR USING BTECHGEEKS CALCULATOR

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