Go Arrays

Internal

• Go Built-in Types

Overview

An array is a numbered sequence of elements, of a single type, and with a fixed length. The length of the array is part of the type name, arrays with different lengths are different types, even if the element type is the same. Arrays are rarely used in Go code, slices are used instead.

Declaration

var a [5]int

A declaration without explicit initialization initializes the array with the type's zero value.

Type inference and initialization declaration:

a := [5]int{1, 2, 3, 4, 5}

Array Literals

a := [5]int{1, 2, 3, 4, 5}

a := [5]int{
        1, 
        2, 
        3, 
        4, 
        5,
   }

The extra trailing comma is required when the elements are specified on separate lines, but not when they're specified in a single line. This is to allow commenting out elements without breaking the program.

Array Operators and Functions

Indexing Operator

Indexing operator [] returns the value at that position.

Array Length

len()