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Introduction to Arrays

Part of the Fundamentals section of Coddy's GO journey — lesson 67 of 109.

Arrays in Go store fixed-size collections of elements of the same type.

Declare an array of 5 integers:

var scores [5]int

Initialize an array with values:

var fruits = [3]string{"apple", "banana", "orange"}

Access array elements using index (starting from 0):

fmt.Println(fruits[1])

This displays:

banana

Modify an array element:

fruits[0] = "mango"
fmt.Println(fruits)

Result:

[mango banana orange]

Cheat sheet

Arrays in Go store fixed-size collections of elements of the same type.

Declare an array:

var scores [5]int

Initialize with values:

var fruits = [3]string{"apple", "banana", "orange"}

Access elements using index (starting from 0):

fmt.Println(fruits[1]) // banana

Modify elements:

fruits[0] = "mango"

Try it yourself

This lesson doesn't include a code challenge.

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Fundamentals

1Introduction to Go

What is Go?Hello World Println Go Comments

4Comparison & Logical Operators

Comparison Operators - Part 1 Comparison Operators - Part 2 Logical AND Operator Logical OR Operator Logical NOT Operator Operator Precedence Basics Recap - Making Comparisons

7Control Flow: Loops

What The `for` Loop Explained For Loop - Basic For Loop - Condition Only The `break` Keyword The `continue` Keyword Nested Loops Recap - Repeating Actions

10Composite Types: Arrays

Introduction to ArraysDeclaring Arrays Initializing Arrays Accessing Array Elements Array Length with `len`Iterating Over Arrays Multi-dimensional Arrays

13Composite Types: Structs

Defining Custom Types Creating Struct Instances Accessing Struct Fields Pointers to Structs Initializing Structs Embedded Structs Anonymous Structs Recap - Custom Data Structures

2Variables and Basic Data Types

What is a variable Type Inference with `:=`Integers (int)Floating-Point Numbers Booleans Strings Zero Values Constants Naming Conventions Recap - Variables and Types

5Basic Input/Output

Formatted Output Format Verbs Printing Types Getting Basic User Input Recap - Input and Output

8Functions

Understanding Functions Declaring a Function Calling Functions Function Parameters Returning a Single Value Returning Multiple Values Named Return Values Function Scope Basics Recap - Creating Reusable Code

11Composite Types: Slices

Introduction to Slices Declaring Slice Literals Creating Slices with `make`Slice Length vs Capacity Accessing Slice Elements Appending Elements Slicing Existing Slices/Arrays Iterating Over Slices Copying Slices Recap - Dynamic Lists

14Basic Error Handling

The Concept of Errors The `error` Interface Functions Returning Errors Checking for Errors Creating Simple Errors Creating Formatted Errors Basic Error Handling Recap - Handling Problems