Golang in short

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status

date

slug

summary

Go is

A modern high-level programming language that resembles C

Open-source, compiled, statically typed, and memory-safe

Go has

Simple yet powerful package management (pulls directly from GitHub)

Built-in concurrency primitives

Garbage collection (GC)

Lightning-fast compilation

Minimal syntax

Cross-platform compilation

Go doesn't have

Classes and inheritance

Function overloading

Implicit type conversions

I use Go to

Say goodbye to Java's verbose syntax

Build web services and microservices

Handle high-concurrency scenarios

Go is perfect for

Web services and RESTful APIs

Microservices architecture

Network programming and distributed systems

Go might not be ideal for

GUI desktop applications

Kernel development

Machine learning (Python has a stronger ecosystem)

Installing Go

Using OS package managers

Linux: apt, yum, snap

macOS: brew

Windows: choco, scoop, etc.

Download official precompiled binaries

Already compiled, ready to use

Set up path and links manually

Verify with go version

Hello World

Types

Variables and Functions

Arrays, Slices, and Maps

Control Flow

Defer and Channels

Pointers

Format Verbs

Verb	Description	Example	Output
%v (value)	Default format	Printf("%v", people)	{zhangsan}
%+v	Adds field names for structs	Printf("%+v", people)	{Name:zhangsan}
%#v	Go syntax representation	Printf("%#v", people)	main.Human{Name:"zhangsan"}
%T (type)	Type in Go syntax	Printf("%T", people)	main.Human
%%	Percent sign	Printf("%%")	%
%t (true)	true or false	Printf("%t", true)	true
%b (binary)	Binary representation	Printf("%b", 5)	101
%c (char)	Unicode character	Printf("%c", 0x4E2D)	中
%d (decimal)	Decimal	Printf("%d", 0x12)	18
%o (octal)	Octal	Printf("%o", 10)	12
%q (quote)	Single-quoted character literal	Printf("%q", 0x4E2D)	'中'
%x	Hexadecimal, lowercase	Printf("%x", 13)	d
%X	Hexadecimal, uppercase	Printf("%X", 13)	D
%U (unicode)	Unicode format: U+1234	Printf("%U", 0x4E2D)	U+4E2D
%b	Binary exponent scientific notation	Printf("%b", 10.5)	5835037194198p-49
%e	Scientific notation	Printf("%e", 10.2)	1.020000e+01
%E	Scientific notation	Printf("%E", 10.2)	1.020000E+01
%f (float)	Decimal point, no exponent	Printf("%f", 10.2)	10.200000
%g	Compact format (%e or %f)	Printf("%g", 10.20)	10.2
%G	Compact format (%E or %f)	Printf("%G", 10.20)	10.2
%s (string)	String (string or []byte)	Printf("%s", []byte("Go"))	Go
%q	Double-quoted string	Printf("%q", "Go")	"Go"
%x	Hex, lowercase, two chars per byte	Printf("%x", "golang")	676f6c616e67
%X	Hex, uppercase, two chars per byte	Printf("%X", "golang")	676F6C616E67
%p (pointer)	Hexadecimal with 0x prefix	Printf("%p", &people)	0x4f57f0
+	Always print sign; ASCII-only for %+q	Printf("%+q", "中文")	"\u4e2d\u6587"
-	Pad with spaces on right (left-align)	ㅤ	ㅤ
#	Alternate format: 0 prefix for octal (%#o), 0x for hex (%#x), etc.	Printf("%#U", '中')	U+4E2D '中'
' '	Space for elided sign; spaces between bytes for hex	ㅤ	ㅤ
0	Pad with zeros; moves padding after sign for numbers	ㅤ	ㅤ