A Variable in which a value cannot be changed.

The ‘const’ keyword declares the variable as “constant”. That means it is unchangeable and read-only.

Syntax:

Const CONSTNAME type  =  value

Package main
Import “fmt”

Const PI=3.14

Func main() {
Fmt.Println(PI)
}

1. Typed constants

Simple variable deceleration Go Lang program.

package main

import "fmt"

const X int = 10

func main() {
    fmt.Println(X)
}

Output :

2.Untyped constants

Program to illustrate untyped variables.

package main

import "fmt"

const X = 11 //untyped constants/without a type

func main() {
    fmt.Println(X)
}

Output :

3.Program to illustrate mixed Constants.

package main

import "fmt"

const (
    X int = 1
    Y     = 3343.4
    Z     = "Prwatech"
)

func main() {
    fmt.Println(X)
    fmt.Println(Y)
    fmt.Println(Z)

}

Output :

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