Goroutine creation - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start a new goroutine that calls the function sayHello.

Go

func sayHello() {
    println("Hello from goroutine")
}

func main() {
    [1] sayHello()
}

Drag options to blanks, or click blank then click option'

Astart

Bfunc

Cdefer

Dgo

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'func' instead of 'go' to start a goroutine.

Using 'defer' which delays execution until the surrounding function returns.

Using 'start' which is not a Go keyword.

The keyword 'go' is used to start a new goroutine in Go.

2fill in blank

medium

Complete the code to start a goroutine that prints "Hi" using an anonymous function.

Go

func main() {
    [1] func() {
        println("Hi")
    }()
}

Drag options to blanks, or click blank then click option'

Ago

Bdefer

Cfunc

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting the 'go' keyword and just calling the function normally.

Using 'defer' which delays execution.

Using 'start' which is not valid in Go.

The 'go' keyword starts the anonymous function as a goroutine.

3fill in blank

hard

Fix the error in the code to correctly start a goroutine that calls printNumber with argument 5.

Go

func printNumber(n int) {
    println(n)
}

func main() {
    [1] printNumber(5)
}

Drag options to blanks, or click blank then click option'

Afunc

Bgo

Cdefer

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to add 'go' before the function call.

Using 'func' which declares a function but does not start a goroutine.

Using 'defer' which delays execution.

The 'go' keyword is required to start the function call as a goroutine.

4fill in blank

hard

Fill both blanks to create a goroutine that prints numbers from 1 to 3 using a loop.

Go

func main() {
    for i := 1; i <= 3; i++ {
        [1] func(n int) {
            println(n)
        }([2])
    }
}

Drag options to blanks, or click blank then click option'

Ago

Bi

Cn

Ddefer

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'defer' instead of 'go' to start the goroutine.

Passing the wrong variable name to the function.

Not passing any argument to the function.

Use 'go' to start the goroutine and pass 'i' as the argument to the function.

5fill in blank

hard

Fill all three blanks to create a goroutine that prints the square of each number in the slice.

Go

func main() {
    nums := []int{2, 4, 6}
    for _, [1] := range nums {
        [2] func(n int) {
            println(n [3] n)
        }([1])
    }
}

Drag options to blanks, or click blank then click option'

Anum

Bgo

C*

Di

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'i' instead of 'num' as the variable name.

Omitting the 'go' keyword.

Using '+' instead of '*' for multiplication.

Use 'num' as the variable name, 'go' to start the goroutine, and '*' to multiply the number by itself.