Notice: This page requires JavaScript to function properly.
Please enable JavaScript in your browser settings or update your browser.Learn 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

Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 1. ChapterΒ 5

Ask AI

expand

Ask AI

ChatGPT

Ask anything or try one of the suggested questions to begin our chat

Awesome!

Completion rate improved to 1.96

bookModifying Variable Values

Swipe to show menu

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

Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 1. ChapterΒ 5
some-alt