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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

book
Declaring and Defining Functions

A function is a reusable block of code that accomplishes a specific task. To declare a function, you can use the func keyword. Here is the syntax for defining a basic function:

go

Below is a straightforward example of a function created using the provided format:

go

index

copy

              
123

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

Here is a visual representation illustrating the declaration of a function:

If we incorporate the code provided above into our program, it will transform into a reusable component that we can invoke as often as needed by calling the function. To call or execute a function, use the following syntax:

python

Here is an example of a comprehensive program that employs the previously mentioned function:

go

index

copy

              
12345678910

            
package main
import "fmt"

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

func main() {
      sayHelloWorld()
}

Within the main function, we utilized sayHelloWorld() to invoke the function. You can replicate this call as many times as needed to execute it repeatedly:

go

index

copy

              
123456789101112

            
package main
import "fmt"

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

func main() {
      sayHelloWorld()
      sayHelloWorld()
      sayHelloWorld()
}
question mark

Select the appropriate line of code to call the defined function:

Select the correct answer

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SectionΒ 4. ChapterΒ 1
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