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Introduction to GoLang
course content

Contenuti del Corso

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
Multiple Return Values

Similar to passing multiple arguments into a function, we can also retrieve multiple data values from the function.

The syntax for defining a function with multiple return values is as follows:

func myFunc(param_1 int, ...) (datatype_1, datatype_2, ...) {
      return expression_1, expression_2, ...
}

Below is an example of a function that returns two distinct values:

index.go

index.go

copy

              
12345678910111213141516171819202122

            
package main
import "fmt"

func getGroup(n int) string {
      if (n % 2 == 0) {
            return "Even"
      } else {
            return "Odd"
      }
}


func evaluateNumber(n int) (int, string) {
      var square int = n*n
      var group string = getGroup(n)
     
      return square, group
}

func main() {
      fmt.Println(evaluateNumber(5)) // Outputs: 25 Odd
}

The returned values can be stored using the following syntax:

index.go

index.go

copy

              
1234

            
// Syntax: var variable_1, variable_2, ... = myFunc(...)
var val_1, val_2 = evaluateNumber(5)
fmt.Println("Square:", val_1)
fmt.Println("Group:", val_2)
question mark

Complete the following code by selecting an appropriate answer:

Select the correct answer

Tutto è chiaro?

Come possiamo migliorarlo?

Grazie per i tuoi commenti!

Sezione 4. Capitolo 5

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course content

Contenuti del Corso

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
Multiple Return Values

Similar to passing multiple arguments into a function, we can also retrieve multiple data values from the function.

The syntax for defining a function with multiple return values is as follows:

func myFunc(param_1 int, ...) (datatype_1, datatype_2, ...) {
      return expression_1, expression_2, ...
}

Below is an example of a function that returns two distinct values:

index.go

index.go

copy

              
12345678910111213141516171819202122

            
package main
import "fmt"

func getGroup(n int) string {
      if (n % 2 == 0) {
            return "Even"
      } else {
            return "Odd"
      }
}


func evaluateNumber(n int) (int, string) {
      var square int = n*n
      var group string = getGroup(n)
     
      return square, group
}

func main() {
      fmt.Println(evaluateNumber(5)) // Outputs: 25 Odd
}

The returned values can be stored using the following syntax:

index.go

index.go

copy

              
1234

            
// Syntax: var variable_1, variable_2, ... = myFunc(...)
var val_1, val_2 = evaluateNumber(5)
fmt.Println("Square:", val_1)
fmt.Println("Group:", val_2)
question mark

Complete the following code by selecting an appropriate answer:

Select the correct answer

Tutto è chiaro?

Come possiamo migliorarlo?

Grazie per i tuoi commenti!

Sezione 4. Capitolo 5
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