Why functions are needed in Go - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a function named greet.

Go

func [1]() {
    println("Hello, friend!")
}

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

Agreet

Bmain

Chello

DsayHello

Attempts:

3 left

💡 Hint

Common Mistakes

Using main instead of greet.

Forgetting to name the function.

The function name must be greet to match the task.

2fill in blank

medium

Complete the code to call the greet function.

Go

func main() {
    [1]()
}

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

Aprint

Bhello

Cgreet

DsayHello

Attempts:

3 left

💡 Hint

Common Mistakes

Calling a function that does not exist.

Forgetting the parentheses after the function name.

To run the greeting, we call the function named greet.

3fill in blank

hard

Fix the error in the function definition by completing the code.

Go

func greet[1] {
    println("Hello!")
}

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

A[]

B()

C<>

D{}

Attempts:

3 left

💡 Hint

Common Mistakes

Using curly braces {} right after the function name instead of parentheses.

Omitting parentheses entirely.

Functions in Go need parentheses after the name, even if no parameters are used.

4fill in blank

hard

Fill both blanks to create a function that adds two numbers and returns the result.

Go

func add(a int, b int) [1] {
    return a [2] b
}

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

Aint

B+

Cstring

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using string as return type instead of int.

Using subtraction - instead of addition.

The function must declare it returns an int and use + to add.

5fill in blank

hard

Fill all three blanks to create a function that checks if a number is even.

Go

func isEven(n int) [1] {
    return n [2] 2 [3] 0
}

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

Abool

B%

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using int as return type instead of bool.

Using != instead of == for comparison.

The function returns a bool. Use % for remainder and == to compare to zero.