What are the data types in golang?

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