Hey guys, in this article you will learn about the basic variables and types in Golang.

First of all, what is Golang? Golang is a simple, objective and extremely efficient language created by Google Movements. The main objective is to do a lot with little code.

1. Basic Types

one. Integers

Signed integers:

int (size depends on architecture: 32 bits on 32-bit systems, 64 bits on 64-bit systems)

int8 (8 bits, -128 to 127)

int16 (16 bits, -32,768 to 32,767)

int32 (32 bits, -2,147,483,648 to 2,147,483,647)

int64 (64 bits, -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807)

Unsigned integers:

uint (size depends on architecture: 32 or 64 bits)

uint8 (8 bits, 0 to 255; equivalent to byte)

uint16 (16 bits, 0 to 65,535)

uint32 (32 bits, 0 to 4,294,967,295)

uint64 (64 bits, 0 to 18,446,744,073,709,551,615)

b. Floating Point Numbers

float32 (precision of 6 to 9 decimal digits)

float64 (precision of 15 to 17 decimal digits)

w. Complex Numbers

complex64 (composed of two float32 values)

complex128 (composed of two float64 values)

d. Strings

string: immutable sequence of Unicode characters.

and. Booleans

bool: can be true or false.

2. Composite Types

the. Arrays

Contain a fixed number of elements of a single type.

var nums [5]int // Array of 5 integers

b. slices

Represent dynamic slices of arrays.

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

w. Maps

Key-value structure.

var m map[string]int // Map from string to integer

d. Structures

Collection of grouped fields.

type Person struct {

String name

Internal age

}



and. Pointers

Reference to memory address.

var p *int

f. Interfaces

Defines behavior and allows abstraction.

type Interface Animal {

String Speak()

}

3. Special Types

the. Functions

Types that represent functions.

var f function(int, int) int

b. Channels

Used for communication between goroutines.

var ch chan int

w. void interface

Void interface (interface{}) that can store any type.

var xinterface{}

d. Unsafe pointer

Pointers that bypass type checking. Used in advanced scenarios.

import "unsafe"

var p unsafe.Pointer



Resume

Data types in Go are designed to be simple and efficient, with a focus on type safety and performance. They cover most common use cases and offer enough flexibility for complex applications.

🚀 link: https://go.dev/tour/basics/11