In this tutorial you will learn about the Java Program to make a calculator using switch case and its application with practical example.
In this tutorial, we will learn to create a Java Program to make calculator using switch case in Java using Java programming.
Prerequisites
Before starting with this tutorial we assume that you are best aware of the following Java programming topics
- Java Operators.
- Basic Input and Output function in Java.
- Class and Object in Java.
- Basic Java programming.
- If-else statements in Java.
- For loop in Java.
- Scanner class.
- Basic inbuilt unctions.
What is calculator?
Calculator is a portable electronic machine used to perform calculations,basic arithmetic mathematics.
Like : arithmetic continuations “( +,-,*/,%)”.
Java Program to make a calculator using switch case
In our program we will make a calculator using switch case in java programming. We would first declared and initialized the required variables. Next, we would prompt user to input the two values and a symbol for calculating values .Lets have a look at the code.
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// Java program fro calculator using swicth case stamenents.. import java.util.Scanner; public class Calculator { public static void main(String[] args) { double a,b,result; // Declaring a variables Scanner s = new Scanner(System.in); System.out.print("Enter first number value:"); a = s.nextDouble(); // getting values from user... System.out.print("Enter second number value:"); b = s.nextDouble(); System.out.print("Enter any operator (+, -, *, /): "); char op = s.next().charAt(0); // taking operator switch(op) // using switch case to create Caluclator { case '+': result = a + b; break; // condition for addition case '-': result =a - b; break; // condition for subtraction case '*': result = a * b; break; // condition for Multiplicatin case '/': result = a / b; break; // condition for Divison default: System.out.printf("You have entered wrong operator or value"); return; } System.out.println(a+" "+op+" "+b+": "+result); } } |
Output
Switch case Calculator.
In the above program, we have first declared and initialized a set variables required in the program.
- a= it will hold First value.
- b= it will hold second value.
- op=it will hold operator value.
And in the next statement user will be prompted to enter two values and which will be assigned to variable ‘a‘ and ‘b‘ respectively.
And after taking the values of a and b we will ask user to input symbol to perform calculation
After taking all the values and sign in op we will pass the value of op to switch case condition Calculate values of a operation pass to switch case.
The above switch case compute the Multiplication of two numbers and print the output.
And with the break statement compiler ends the switch statement and operation given different different operators can be performed.
