Return values in Go - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to return the sum of two integers.

Go

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

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A+

B-

C*

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using subtraction or multiplication instead of addition.

Forgetting to return the result.

The function should return the sum of a and b. The + operator adds two numbers.

2fill in blank

medium

Complete the code to return the length of a string.

Go

func length(s string) int {
    return [1](s)
}

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Alength

Bsize

Clen

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using non-existent functions like size or count.

Trying to access string length as a property.

The built-in len function returns the length of a string in Go.

3fill in blank

hard

Fix the error in the function to return the product of two floats.

Go

func multiply(x float64, y float64) float64 {
    return x [1] y
}

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A+

B*

C/

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using addition or division instead of multiplication.

Syntax errors by missing operator.

The function should return the product, so the multiplication operator * is needed.

4fill in blank

hard

Fill both blanks to return a map with words as keys and their lengths as values, only for words longer than 3 characters.

Go

func wordLengths(words []string) map[string]int {
    lengths := make(map[string]int)
    for _, word := range words {
        if [1](word) [2] 3 {
            lengths[word] = [1](word)
        }
    }
    return lengths
}

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Alen

B>

C<

Dcap

Attempts:

3 left

💡 Hint

Common Mistakes

Using cap instead of len.

Using < instead of >.

Not calling len as a function.

The function uses len(word) to get the length of each word and checks if it is greater than 3 using >.

5fill in blank

hard

Fill all three blanks to return a new map with uppercase keys and values only for entries with values greater than 10.

Go

func filterAndUppercase(data map[string]int) map[string]int {
    result := make(map[string]int)
    for [1], [2] := range data {
        if [2] [3] 10 {
            result[strings.ToUpper([1])] = [2]
        }
    }
    return result
}

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

AToUpper

Bv

C>

Dk

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up key and value variable names.

Using wrong comparison operators.

Forgetting to call ToUpper as a function.

The loop uses k and v for key and value. It checks if v > 10 and adds the uppercase key using strings.ToUpper().