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

Multi-Dimensional Arrays

A multidimensional array is an array that includes other arrays as its elements, forming a matrix or a higher-dimensional structure.

We can create 2D, 3D, and 4D arrays using the following format:

var array2D [lengthX][lengthY] dataType
var array3D [lengthX][lengthY][lengthZ] dataType
…

For example, we can create a 2x2 matrix using the following code:

index.go


              1
            
var matrix [2][2] int

We can also initialize it with some data using the following syntax:

index.go


              12
            
var numbers = [2][2] int { { 1, 2 }, { 3, 4} }
fmt.Println(numbers) // Output: [[1 2] [3 4]]

We can access and modify the elements of a multidimensional array using indexing by specifying both the row and column's index of the element:

index.go


              1234
            
var numbers = [2][2] int { { 1, 2 }, { 3, 4} }
fmt.Println(numbers) // Output: [[1 2] [3 4]]
numbers[1][0] = 5
fmt.Println(numbers) // Output: [[1 2] [5 4]]

Following is an illustration of a 2D array with 9 elements:

An array can have as many dimensions as needed. Following is an example of a 5-dimensional array:

index.go


              1
            
var numbers [2][3][4][5][2] int

The above array will have 240 elements based on the calculation 2 x 3 x 4 x 5 x 2 = 240. The following code shows the declaration and initialization of a 3D array called `numbers:

index.go


              1234
            
var numbers = [2][3][2] int {
    { {1, 2}, {3, 4}, {5, 6} },
    { {7, 8}, {9, 10}, {11, 12} },
}

Everything was clear?

Thanks for your feedback!

Section 5. Chapter 5

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Course Content

Introduction to GoLang

1. Getting Started

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

5. Arrays and Slices

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

Multi-Dimensional Arrays

A multidimensional array is an array that includes other arrays as its elements, forming a matrix or a higher-dimensional structure.

We can create 2D, 3D, and 4D arrays using the following format:

var array2D [lengthX][lengthY] dataType
var array3D [lengthX][lengthY][lengthZ] dataType
…

For example, we can create a 2x2 matrix using the following code:

index.go


              1
            
var matrix [2][2] int

We can also initialize it with some data using the following syntax:

index.go


              12
            
var numbers = [2][2] int { { 1, 2 }, { 3, 4} }
fmt.Println(numbers) // Output: [[1 2] [3 4]]

We can access and modify the elements of a multidimensional array using indexing by specifying both the row and column's index of the element:

index.go


              1234
            
var numbers = [2][2] int { { 1, 2 }, { 3, 4} }
fmt.Println(numbers) // Output: [[1 2] [3 4]]
numbers[1][0] = 5
fmt.Println(numbers) // Output: [[1 2] [5 4]]

Following is an illustration of a 2D array with 9 elements:

An array can have as many dimensions as needed. Following is an example of a 5-dimensional array:

index.go


              1
            
var numbers [2][3][4][5][2] int

The above array will have 240 elements based on the calculation 2 x 3 x 4 x 5 x 2 = 240. The following code shows the declaration and initialization of a 3D array called `numbers:

index.go


              1234
            
var numbers = [2][3][2] int {
    { {1, 2}, {3, 4}, {5, 6} },
    { {7, 8}, {9, 10}, {11, 12} },
}

Everything was clear?

Thanks for your feedback!

Section 5. Chapter 5