How to make a simple calculator using go language-

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)  

}