Introduction to GoLang

1. Getting Started

In this section, you will be introduced to the Go programming language and learn how to create variables and constants. You will also learn how to do operations with values and manipulate variable values.

What is Go Programming Language?

Hello World

Comments in Go

Basics of Variables

Modifying Variable Values

Constants

Basics of Operators & Expressions

Challenge: Hello World

Challenge: Comments in Go

Challenge: Basics of Variables

Challenge: Constants

2. Data Types

In this section, we will learn about the different types of data in Go. We will learn how to deal with different Data Types and some basic operations that can be performed on that data.

Integers

Floating-Point Numbers

Challenge: String Formatting Practice

3. Control Structures

In this section, we will learn about some important concepts which allow us to control the flow of the program. These concepts or features of a programming language are collectively known as Control Structures. In order to learn about these concepts, we need some knowledge of some additional operators, which we will explore at the beginning of this section.

Comparison Operators

Conditional Statements

Challenge: Practicing For Loop

4. Functions

In this section, we will learn about functions which are the building blocks of any programming language. We will learn how to create different kinds of functions and how to use them. We will also learn about scopes of variables which will help us in working with functions.

Declaring and Defining Functions

Local and Global Scopes

Passing Data into the Functions

Return Values from Functions

Multiple Return Values

Passing Functions as Arguments

Challenge: Reviewing Concepts of Functions

5. Arrays and Slices

In this section, we will learn about a very useful data type called Array that can be used for tasks where we need to store a bigger quantity of similar data and some other cases as well. Will will learn how to create, use and manipulate arrays. Additionally, we will also learn how to use arrays to pass a variable number of arguments into a function. In this section, we will also learn about slices which are similar to arrays however differ in fundamental quality.

Declaring Arrays

Accessing and Modifying Array Elements

Slices

Length vs Capacity

Multi-Dimensional Arrays

Iterating Over Arrays

Passing Variable Number of Arguments into Functions

Passing Arrays into Functions

Challenge: Finding the Largest Element in a Grid

6. Intro to Structs & Maps

In this section, we will learn about two very useful data types, namely Structs (Structures) and Maps.

Creating Structs

Creating Instances of Structs

Data in Structs

What are Maps?

Map Declaration and Initialization

Accessing Map Values

Deleting Keys From Maps

Challenge: Creating a Structure

Hello World

As a first step, we will start with the conventional "Hello World" program so that you can get acquainted with the syntax and basic structure of a Go program. Following is the code to output "Hello World" using Go:

index.go

Here main() represents a function, indicated by the keyword func before it.

Note
Keywords, also known as reserved words, are special words with predefined meanings that serve specific purposes in the language. Most of the keywords, like func itself, will be explained in detail where relevant. The keywords we will learn in this section are var and const.

func main()

Everything enclosed within the following curly braces {} is executed when the program runs. In this case, the fmt.Println statement is the first thing to execute.

index.go

fmt.Println prints whatever is inside the double quotes (") to the console, which in this case is "Hello World". Textual data is always enclosed in double quotation marks (").

Note
Commas , can be used in the fmt.Println statement to output multiple pieces of numerical or textual data. Spaces are automatically added between the values.

index.go

Detailed explanations of the remaining code components will be provided in later chapters as they become relevant.

Everything was clear?

Section 1. Chapter 2

Course Content

Introduction to GoLang

1. Getting Started

What is Go Programming Language?Hello World Comments in Go Basics of Variables Modifying Variable Values Constants Basics of Operators & Expressions Challenge: Hello World Challenge: Comments in Go Challenge: Basics of Variables Challenge: Constants

2. Data Types

Integers Floating-Point Numbers Booleans Runes Strings Basic Type Casting String Formatting Challenge: String Formatting Practice

3. Control Structures

Comparison Operators Conditional Statements Conditional Chaining Logical Operators Switch Statement For Loop Break Statement Challenge: Practicing For Loop

4. Functions

Declaring and Defining Functions Local and Global Scopes Passing Data into the Functions Return Values from Functions Multiple Return Values Passing Functions as Arguments Challenge: Reviewing Concepts of Functions

5. Arrays and Slices

Declaring Arrays Accessing and Modifying Array Elements Slices Length vs Capacity Multi-Dimensional Arrays Iterating Over Arrays Passing Variable Number of Arguments into Functions Passing Arrays into Functions Challenge: Finding the Largest Element in a Grid

6. Intro to Structs & Maps

Creating Structs Creating Instances of Structs Data in Structs What are Maps?Map Declaration and Initialization Accessing Map Values Deleting Keys From Maps Challenge: Creating a Structure

Introduction to GoLang

Hello World

index.go

Here main() represents a function, indicated by the keyword func before it.

Note
Keywords, also known as reserved words, are special words with predefined meanings that serve specific purposes in the language. Most of the keywords, like func itself, will be explained in detail where relevant. The keywords we will learn in this section are var and const.

func main()

Everything enclosed within the following curly braces {} is executed when the program runs. In this case, the fmt.Println statement is the first thing to execute.

index.go

fmt.Println prints whatever is inside the double quotes (") to the console, which in this case is "Hello World". Textual data is always enclosed in double quotation marks (").

Note
Commas , can be used in the fmt.Println statement to output multiple pieces of numerical or textual data. Spaces are automatically added between the values.

index.go

Detailed explanations of the remaining code components will be provided in later chapters as they become relevant.

Everything was clear?

Section 1. Chapter 2