Function declaration in Go - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a function named greet.

Go

func [1]() {
    fmt.Println("Hello!")
}

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

Ahello

Bprint

CsayHello

Dgreet

Attempts:

3 left

💡 Hint

Common Mistakes

Using a name that is not the function's intended name.

Forgetting to write the function name after func.

The function name is greet. This declares a function called greet that prints "Hello!".

2fill in blank

medium

Complete the code to declare a function that returns an integer 5.

Go

func getNumber() [1] {
    return 5
}

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

Aint

Bstring

Cbool

Dfloat64

Attempts:

3 left

💡 Hint

Common Mistakes

Using a return type that does not match the returned value.

Forgetting to specify the return type.

The function returns an integer, so the return type is int.

3fill in blank

hard

Fix the error in the function declaration to accept a string parameter named name.

Go

func greet([1] string) {
    fmt.Println("Hello,", name)
}

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

Avar name

Bstring

Cname

Dgreet

Attempts:

3 left

💡 Hint

Common Mistakes

Writing the type before the parameter name.

Using keywords like var inside parameter list.

The parameter name should be name followed by its type string.

4fill in blank

hard

Fill both blanks to declare a function that takes two integers and returns their sum.

Go

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

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

Aint

Bstring

Cfloat64

Dbool

Attempts:

3 left

💡 Hint

Common Mistakes

Using different types for parameters that are added.

Using non-integer types when integers are expected.

Both parameters are integers, so both blanks should be int.

5fill in blank

hard

Fill all three blanks to declare a function that takes a string and an int, and returns a formatted string.

Go

func formatMessage(name [1], age [2]) [3] {
    return fmt.Sprintf("%s is %d years old", name, age)
}

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

Astring

Bint

Dbool

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up parameter types.

Using wrong return type.

The function takes a string and an int, and returns a string.