In this post, we will see how to create a simple calculator in java.
This calculator program performs 4 basic operatios – Addition, Substraction, Multiplication and division.It uses Switch case to choose operation you want to perform.
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import java.util.Scanner; public class Calculator { public static void main(String args[]) { float num1, num2, result; char operation, ch; Scanner scan = new Scanner(System.in); do { System.out.print("1. Addition\n"); System.out.print("2. Subtraction\n"); System.out.print("3. Multiplication\n"); System.out.print("4. Division\n"); System.out.print("5. Exit\n\n"); System.out.print("Enter your operation : "); operation = scan.next().charAt(0); switch(operation) { case '1' : System.out.print("Enter Two Number : "); num1 = scan.nextFloat(); num2 = scan.nextFloat(); result = num1 + num2; System.out.print("Addition of numbers is " + result); break; case '2' : System.out.print("Enter Two Number : "); num1 = scan.nextFloat(); num2 = scan.nextFloat(); result = num1 - num2; System.out.print("Subtraction of numbers is " + result); break; case '3' : System.out.print("Enter Two Number : "); num1 = scan.nextFloat(); num2 = scan.nextFloat(); result = num1 * num2; System.out.print("Multiplication of numbers is " + result); break; case '4' : System.out.print("Enter Two Number : "); num1 = scan.nextFloat(); num2 = scan.nextFloat(); result = num1 / num2; System.out.print("Division of numbers is " + result); break; case '5' : System.exit(0); break; default : System.out.print("Wrong operation!!!"); break; } System.out.print("\n---------------------------------------\n"); }while(operation != 5); } } |
Output:
1. Addition
2. Subtraction
3. Multiplication
4. Division
5. ExitEnter your operation : 3
Enter Two Number : 5 7
Multiplication of numbers is 35.0
—————————————
1. Addition
2. Subtraction
3. Multiplication
4. Division
5. ExitEnter your operation : 1
Enter Two Number : 55 25
Addition of numbers is 80.0
—————————————
1. Addition
2. Subtraction
3. Multiplication
4. Division
5. ExitEnter your operation : 5
2. Subtraction
3. Multiplication
4. Division
5. ExitEnter your operation : 3
Enter Two Number : 5 7
Multiplication of numbers is 35.0
—————————————
1. Addition
2. Subtraction
3. Multiplication
4. Division
5. ExitEnter your operation : 1
Enter Two Number : 55 25
Addition of numbers is 80.0
—————————————
1. Addition
2. Subtraction
3. Multiplication
4. Division
5. ExitEnter your operation : 5
That’s all about java program to make simple calculator.
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