Go by Example: Constants

Constants in Go are used to declare values that cannot be changed during the execution of a program. Constants are declared using the const keyword, followed by the name of the constant, the type, and the value.

Here’s an example of declaring a constant in Go:

package main

import "fmt"

func main() {
    const Pi float64 = 3.14159265358979323846
    fmt.Println("Pi:", Pi)
}

In the above example, Pi is a constant of type float64 with the value 3.14159265358979323846.

Constants can also be declared without specifying a type, in which case the type is inferred from the value. Here’s an example:

package main

import "fmt"

func main() {
    const Pi = 3.14159265358979323846
    fmt.Println("Pi:", Pi)
}

In this tutorial, we’ve covered how to declare constants in Go using the const keyword. Constants are used to declare values that cannot be changed during the execution of a program.