Mastering Go - Second Edition

The constant generator iota

The constant generator iota is used for declaring a sequence of related values that use incrementing numbers without the need to explicitly type each one of them.

Most of the concepts related to the const keyword, including the constant generator iota, will be illustrated in the constants.go file, which will be presented in four parts.

The first code segment of constants.go is next:

package main 
 
import ( 
    "fmt" 
) 
 
type Digit int 
type Power2 int 
 
const PI = 3.1415926 
 
const (

    C1 = "C1C1C1" 
    C2 = "C2C2C2" 
    C3 = "C3C3C3" 
) 

In this part, we declare two new types named Digit and Power2, and four new constants named PI, C1, C2, and C3.

A Go type is a way of defining a new named type that uses the same underlying type as ...