Notice: This page requires JavaScript to function properly.
Please enable JavaScript in your browser settings or update your browser.Leer Modifying Variable Values | Getting Started
Introduction to GoLang

bookModifying Variable Values

We've learned how to declare a variable. Now, let's understand how to modify the value of a variable.

Take a look at the following program, which prints the value of myVariable using the Println function:

index.go

index.go

copy

              
1234567

            
package main
import "fmt"

func main() {
    var myVariable = 7
    fmt.Println(myVariable) // Using the name of the variable ('myVariable') we can access and show it's value
}

We can use the following syntax for assigning a different value to the variable:

index.go

index.go

copy

              
1

            
myVariable = 9

Notice that this time, we omit the var keyword because we are not declaring a new variable. Now, let's add this line to the program:

index.go

index.go

copy

              
123456789

            
package main
import "fmt"

func main() {
    var myVariable = 7
    fmt.Println(myVariable) // Outputs 7
    myVariable = 9
    fmt.Println(myVariable) // Outputs 9
}

In the code above, we employed the var keyword to declare a variable. Alternatively, we can use the := operator for variable declaration. In such a case, the code will appear as follows:

index.go

index.go

copy

              
123456789

            
package main
import "fmt"

func main() {
    myVariable := 7
    fmt.Println(myVariable) // Outputs 7
    myVariable = 9
    fmt.Println(myVariable) // Outputs 9
}
question mark

Which is the correct way of changing the value of an already declared variable to 10 called myVar:

Select the correct answer

Was alles duidelijk?

Hoe kunnen we het verbeteren?

Bedankt voor je feedback!

Sectie 1. Hoofdstuk 5

Vraag AI

expand

Vraag AI

ChatGPT

Vraag wat u wilt of probeer een van de voorgestelde vragen om onze chat te starten.

bookModifying Variable Values

We've learned how to declare a variable. Now, let's understand how to modify the value of a variable.

Take a look at the following program, which prints the value of myVariable using the Println function:

index.go

index.go

copy

              
1234567

            
package main
import "fmt"

func main() {
    var myVariable = 7
    fmt.Println(myVariable) // Using the name of the variable ('myVariable') we can access and show it's value
}

We can use the following syntax for assigning a different value to the variable:

index.go

index.go

copy

              
1

            
myVariable = 9

Notice that this time, we omit the var keyword because we are not declaring a new variable. Now, let's add this line to the program:

index.go

index.go

copy

              
123456789

            
package main
import "fmt"

func main() {
    var myVariable = 7
    fmt.Println(myVariable) // Outputs 7
    myVariable = 9
    fmt.Println(myVariable) // Outputs 9
}

In the code above, we employed the var keyword to declare a variable. Alternatively, we can use the := operator for variable declaration. In such a case, the code will appear as follows:

index.go

index.go

copy

              
123456789

            
package main
import "fmt"

func main() {
    myVariable := 7
    fmt.Println(myVariable) // Outputs 7
    myVariable = 9
    fmt.Println(myVariable) // Outputs 9
}
question mark

Which is the correct way of changing the value of an already declared variable to 10 called myVar:

Select the correct answer

Was alles duidelijk?

Hoe kunnen we het verbeteren?

Bedankt voor je feedback!

Sectie 1. Hoofdstuk 5
some-alt