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Go Tutorial

Last Updated : May 05, 2025

This Go language programming tutorial provides detailed information step-by-step, starting from the basics to the advanced topics. Each chapter is explained with the help of appropriate examples.

What is Go Programming Language?

Go language is an open-source programming language that makes it easy to build simple, reliable, and efficient software.

Origin and Designers

Go was designed at Google by Robert Griesemer, Rob Pike, and Ken Thompson.

Key Features

Go is a statically typed, compiled programming language that offers:

• Statically typed: You must define variable types before using them.
• Compiled: The code is converted into machine language before running.
• Memory safety: It helps prevent common memory errors.
• Garbage collection: It automatically frees up unused memory.
• Structural typing: Types are checked based on their structure, not just names.
  CSP-style concurrency: It uses lightweight threads (goroutines) to run tasks at the same time.

Go First Example

The most common function for printing to the console is fmt.Println(). Below is a simple example that prints "Hello World" to the screen.

package main
import "fmt"

func main() {
    fmt.Println("Hello World")
}

When executed, this program outputs:

Hello World

Go Code Editor

You can run Go language code on Go Playground.

Go Language Learning Path

Basics

• Go - Keywords
• Go - Data Types
  • Go Boolean Data Type
  • Go Integer Data Types
  • Go Float Data Types
  • Go String Data Type
• Go - Variables
• Go - Constants
• Go - Program Structure
• Go - Comments

Variable Handling

• Go - Naming a Variable
• Go - Shorthand for Defining Multiple Variables/Constants
• Go - Different Ways to Find the Type of a Variable

Literals

• Go - Binary Literals
• Go - Octal Literals
• Go - Hexadecimal Literals

Type Handling

• Go - Type Casting or Type Conversion

Operators

• Go - Operators
  • Go - Arithmetic Operators
  • Go - Relational Operators
  • Go - Logical Operators
  • Go - Bitwise Operators
  • Go - Assignment Operators
  • Go - Miscellaneous Operators
  • Go - Operator Precedence and Associativity

Decision Making

• Go - if Statement
• Go - if-else Statement
• Go - if-else-if Ladder Statement
• Go - Nested if Statement
• Go - Switch Statement
• Go - Select Statement

Loops

• Go Loops
• Go Nested Loops
• Go Break Statement
• Go Continue Statement
• Go Goto Statement
• Go Infinite Loop
• Go Exit an Infinite Loop

Functions

• Go Functions
• Go Function Parameters and Arguments
• Go Call by Value
• Go Call by Reference
• Go Functions as Values
• Go Function Closure
• Go Function Method
• Go Anonymous Function
• Go Function Returns
• Go Recursion Functions
• Go Variadic Functions
• Go main() and init() Function
• Go Pass a Slice to Function
• Go Pass an Array to Function

String Handling

• Go - Strings

Go Arrays

• Go - Arrays
• Go - Multi-dimensional Arrays
• Go - Passing Array to a Function
• Go - Comparing Arrays
• Go - Copying Arrays

Go Structures

• Go Structures
• Go Access Struct Members
• Go Pass Struct as Function Arguments
• Go Nested Structures
• Go Anonymous Structure and Field

Go Slices

• Go Slices
• Go Access Elements of a Slice
• Go Change Elements of a Slice
• Go Append Elements To a Slice
• Go Slice Length and Capacity
• Go Copy a Slice
• Go Slice Ranges
• Go Iterate Over a Slice
• Go Multi-Dimensional Slices
• Go Slice vs Array

Go Maps

• Go Maps
• Go Create an Empty Map
• Go Access Map Elements
• Go Update and Add Map Elements
• Go Remove Element from Map
• Go Check For Specific Elements in a Map

Go Pointers

• Go Pointers
• Go Passing Pointers to a Function
• Go Pointer to a Struct
• Go Pointer to Pointer
• Go Comparing Pointers

Miscellaneous Topics

1. How to print boolean value in Golang?
2. How to print double-quoted string in Golang?
3. Go - Convert from int to binary
4. Go - Convert from int to octal
5. Go - Convert from int to hex
6. How to check if structure is empty in Golang?
7. How to check if key exists in a map in Golang?
8. How to return an error in Golang?
9. Go - new() and make() functions with examples

Exercise with Each Chapter

In this Go tutorial, you will find exercises for every chapter. Each exercise contains 3 questions with 4 answer options. You need to select the correct answer to test your understanding of that specific topic. After answering all the questions, you can check your score.

Who Can Learn Go Language?

Go programming language is easy to learn and has a clean syntax. Thus, it language is a great choice for beginners who are new to programming, students studying computer science, and developers who want to build fast and simple applications. Go programming language is also perfect choice for people who are interested in backend or cloud development.

Prerequisite to Learn Go Language

If you are going to learn the Go programming language, you should have a basic understanding of how computers work and how software runs. If you are familiar with any programming language like C, Java, or Python, it will help you understand Go more quickly. However, knowledge of a programming language is not a must. You should also know how to use a text editor and run simple commands in the terminal.

Go Practice and Exam Preparation

You can prepare for your technical interview and any examination with the resources we have prepared for you: