The const Keyword

You can use const prefix to declare constants with a specific type as follows −

const variable type = value;

The following example shows how to use the const keyword −

package main

import "fmt"

func main() {

   const LENGTH int = 10

   const WIDTH int = 5   

   var area int

   area = LENGTH * WIDTH

   fmt.Printf("value of area : %d", area)   

}

When the above code is compiled and executed, it produces the following result −

value of area : 50

Note that it is a good programming practice to define constants in CAPITALS.