GoLang

Introduction

This cheat sheet provides a quick reference for some common Go (Golang) programming commands and concepts. Go is an open-source programming language known for its simplicity, efficiency, and concurrency support.

Basic Go Program Structure

A typical Go program has the following structure:

package main

import "fmt"

// Variables
var variableName dataType

// Functions
func functionName(param1 dataType, param2 dataType) returnType {
    // Function body
    return someValue
}

func main() {
    // Main function body
    fmt.Println("Hello, World!")
}

Variables

• Declare and initialize a variable:

  var variableName dataType
  variableName = value

• Declare and initialize a variable with type inference:

  variableName := value

Data Types

• Basic data types in Go include int, float64, string, bool, and more.

• Complex data types like struct and slice can be used for custom data structures.

Functions

• Define a function:

  func functionName(param1 dataType, param2 dataType) returnType {
      // Function body
      return someValue
  }

• Call a function:

  result := functionName(arg1, arg2)

Control Flow

• Use if statements for conditional execution:

  if condition {
      // Code to execute if condition is true
  } else {
      // Code to execute if condition is false
  }

• Use for loops for iteration:

  for i := 0; i < count; i++ {
      // Code to repeat
  }

Slices and Maps

• Create a slice:

  sliceName := []dataType{value1, value2, ...}

• Create a map:

  mapName := make(map[keyType]valueType)

Packages and Imports

• Import packages for external functionality:

  import (
      "fmt"
      "math"
  )

• Create and organize your own packages within your project.

Concurrency

• Use Goroutines for concurrency:

  go funcName(arg)

• Use channels for communication between Goroutines.

Error Handling

• Handle errors using if statements or the panic and recover mechanism.

Structs

• Define a custom data structure using struct:

  type MyStruct struct {
      Field1 dataType
      Field2 dataType
  }

Pointers

• Use pointers to reference variables:

  var x int
  var pointerToX *int = &x

Conclusion

This cheat sheet covers some common Go (Golang) programming commands and concepts. Go is a versatile language with a growing ecosystem; refer to the official Go documentation for more in-depth information and advanced usage.