Return inside loops in Go - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to return the first even number from the slice.

Go

func firstEven(nums []int) int {
    for _, num := range nums {
        if num%2 == 0 {
            return [1]
        }
    }
    return -1
}

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

Anum

Bnums

C0

Dnum + 1

Attempts:

3 left

💡 Hint

Common Mistakes

Returning the entire slice instead of the current number.

Returning a fixed number like 0 instead of the actual even number.

The function returns the first even number found in the slice by returning num inside the loop.

2fill in blank

medium

Complete the code to return true if any number in the slice is negative.

Go

func hasNegative(nums []int) bool {
    for _, n := range nums {
        if n < 0 {
            return [1]
        }
    }
    return false
}

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

A0

Btrue

Cn

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Returning the number itself instead of a boolean.

Returning false inside the loop which stops the check prematurely.

The function returns true immediately when it finds a negative number inside the loop.

3fill in blank

hard

Fix the error in the code to return the index of the first zero in the slice.

Go

func firstZeroIndex(nums []int) int {
    for i, val := range nums {
        if val == 0 {
            return [1]
        }
    }
    return -1
}

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

Anums[i]

Bval

Ci

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Returning the value instead of the index.

Returning a fixed number like 0 regardless of the position.

The function should return the index i where the first zero is found, not the value.

4fill in blank

hard

Fill both blanks to return the sum of positive numbers only.

Go

func sumPositive(nums []int) int {
    sum := 0
    for _, n := range nums {
        if n [1] 0 {
            sum += [2]
        }
    }
    return sum
}

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

A>

Bn

C<

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>' causing wrong numbers to be summed.

Adding zero instead of the number.

The function checks if a number is greater than zero and adds it to sum.

5fill in blank

hard

Fill all three blanks to create a function that returns the first string longer than 3 characters.

Go

func firstLongString(words []string) string {
    for _, w := range words {
        if len([1]) [2] [3] {
            return w
        }
    }
    return ""
}

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

Aw

B>

C3

Dwords

Attempts:

3 left

💡 Hint

Common Mistakes

Checking length of the entire slice instead of the current word.

Using '<' instead of '>' causing wrong results.

The function checks the length of each word and returns the first one longer than 3 characters.