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Introduction to GoLang
course content

Course Content

Introduction to GoLang

Introduction to GoLang

1. Getting Started
What is Go Programming Language?Hello WorldComments in GoBasics of VariablesModifying Variable ValuesConstantsBasics of Operators & ExpressionsChallenge: Hello WorldChallenge: Comments in GoChallenge: Basics of VariablesChallenge: Constants
2. Data Types
IntegersFloating-Point NumbersBooleansRunesStringsBasic Type CastingString FormattingChallenge: String Formatting Practice
3. Control Structures
Comparison OperatorsConditional StatementsConditional ChainingLogical OperatorsSwitch StatementFor LoopBreak StatementChallenge: Practicing For Loop
4. Functions
Declaring and Defining FunctionsLocal and Global ScopesPassing Data into the FunctionsReturn Values from FunctionsMultiple Return ValuesPassing Functions as ArgumentsChallenge: Reviewing Concepts of Functions
5. Arrays and Slices
Declaring ArraysAccessing and Modifying Array ElementsSlicesLength vs CapacityMulti-Dimensional ArraysIterating Over ArraysPassing Variable Number of Arguments into FunctionsPassing Arrays into FunctionsChallenge: Finding the Largest Element in a Grid
6. Intro to Structs & Maps
Creating StructsCreating Instances of StructsData in StructsWhat are Maps?Map Declaration and InitializationAccessing Map ValuesDeleting Keys From MapsChallenge: Creating a Structure

bookAccessing and Modifying Array Elements

In the previous chapter, we learned how to declare and initialize an array. In this chapter, we will explore how to access and modify individual elements of an array.

Each element in the array is assigned an index that represents its position within the array. The first element of an array is assigned the index 0, the second element has the index 1, and so forth. It's important to note that when an array contains ten elements, the last element will have an index of 9, as indexing starts from 0.

Here is the syntax for referencing an element within an array:

Note

The process of accessing array elements by their indexes is referred to as indexing.

Let's revisit the students array we discussed in the previous chapter. We can access its second element using indexing:

go

index

copy

              
12

            
var students = [4] string { "Luna", "Max", "Ava", "Oliver" }
fmt.Println(students[1]) // Output: Max

An array functions as a collection of variables. When we reference an element using indexing, we are essentially accessing a variable. Consequently, we can also modify it:

go

index

copy

              
1234

            
var students = [4] string { "Luna", "Max", "Ava", "Oliver" }
fmt.Println(students) // Output: [Luna Max Ava Oliver]
students[1] = "Tom"
fmt.Println(students) // Output: [Luna Tom Ava Oliver]
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Section 5. Chapter 2
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