Basics of Variables

Variables represent one of the most crucial concepts in any programming language. They essentially serve as named memory locations that allow us to access and modify the data stored at those memory locations.

With variables, we can store various types of data in memory, including numbers and text. We will delve into data types in the next section. For now, let's focus on declaring and initializing variables without specifying their types.

The var keyword is employed to declare a variable, followed by the variable's name (myVar) and an equal sign (=) to assign the value on the right (10) to the variable. Another example for better understanding is:

index.go

Another way to achieve the same result is by employing the := operator, and in this scenario, there's no need to utilize the var keyword for variable declaration:

index.go

Naming Variables

Variables can be given any name, although there are specific rules for declaring variables:

A variable's name must start with a letter or an underscore _ character;
Variable names are case-sensitive, so myVar and MyVar are distinct variables;
A variable cannot have a reserved word as its name. In Go, words like var, for, if, and func, among others, are reserved for special purposes and cannot be used as variable names.

Everything was clear?

Section 1. Chapter 4

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

Basics of Variables

index.go

Another way to achieve the same result is by employing the := operator, and in this scenario, there's no need to utilize the var keyword for variable declaration:

index.go

Naming Variables

Variables can be given any name, although there are specific rules for declaring variables:

A variable's name must start with a letter or an underscore _ character;
Variable names are case-sensitive, so myVar and MyVar are distinct variables;
A variable cannot have a reserved word as its name. In Go, words like var, for, if, and func, among others, are reserved for special purposes and cannot be used as variable names.

Everything was clear?

Section 1. Chapter 4