Constants

Introduction

A value that cannot be changed by the program is called a constant. This data can only be of type boolean, number (integer, float, or complex) or string.

Explicit and implicit typing

In Go, a constant can be defined using the keyword const as:

const identifier [type] = value

Here, identifier is the name, and type is the type of constant. Following is an example of a declaration:

const PI = 3.14159

You may have noticed that we didn’t specify the type of constant PI here. It’s perfectly fine because the type specifier [type] is optional because the compiler can implicitly derive the type from the value. Let’s ...