Constant variables are those variables whose value cannot be changed once assigned. A constant in Go programming language is declared by using the keyword “const”
Create a file called constant.go and with the following code
package main
import ("fmt")
func main() {
const b =10
fmt.Println(b)
b = 30
fmt.Println(b)
}
Execute go run constant.go to see the result as
.constant.go:7:4: cannot assign to b
