Golang arithmetic Calculator using switch case example

Golang arithmetic Calculator using switch case example

This blog post covers an example for Arithmetic Simple Calculator using Switch case in Golang.
To understand this example, You should have the following features in the Go language

Arithmetic Calculator using switch case in Golang examples

The below example is to write a Simple Calculator which supports arithmetic Operators such as Add, Subtract, Multiply, Modulus, Division operations.

First Read the input numbers from the user keyboard console, stored in variables number1 and number2.

And also Asks the user to enter Operator from the console, stores it in the Operator symbol. The user values are read from the console using the Scanln function.

For example, If the user entered number1=20 and number2=10 and operator=+

Matched Operator case executed using switch statements and returned the result.

Finally, Print the output to the console using the Printf function.

package main

import "fmt"

func main() {
    var operator string
    var number1, number2 int
    fmt.Print("Please enter First number: ")
    fmt.Scanln( & number1)
    fmt.Print("Please enter Second number: ")
    fmt.Scanln( & number2)
    fmt.Print("Please enter Operator (+,-,/,%,*):")
    fmt.Scanln( & operator)
    output: = 0
    switch operator {
        case "+":
            output = number1 + number2
            break
        case "-":
            output = number1 - number2
        case "*":
            output = number1 * number2
        case "/":
            output = number1 / number2
        case "%":
            output = number1 % number2
        default:
            fmt.Println("Invalid Operation")
    }
    fmt.Printf("%d %s %d = %d", number1, operator, number2, output)
}

The output of the above program is

Please enter First number: 20
Please enter Second number: 10
Please enter Operator (+,-,/,%,*):+
20 %!c(string=+) 10 = 30

Please enter First number: 20
Please enter Second number: 10
Please enter Operator (+,-,/,%,*):+
20 + 10 = 30

Please enter First number: 10
Please enter Second number: 5
Please enter Operator (+,-,/,%,*):/
10 / 5 = 2

Please enter First number: 8
Please enter Second number: 2
Please enter Operator (+,-,/,%,*):%
8 % 2 = 0

Please enter First number: 6
Please enter Second number: 2
Please enter Operator (+,-,/,%,*):*
6 * 2 = 12

Please enter First number: 10
Please enter Second number: 2
Please enter Operator (+,-,/,%,*):-
10 - 2 = 8

Conclusion

This is a simple arithmetic calculator using a switch case example in Go Language.