Appending to slices in Go - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to append the value 5 to the slice.

Go

numbers := []int{1, 2, 3, 4}
numbers = append(numbers, [1])

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

Aappend

B"5"

Cnumbers

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Using quotes around 5, which makes it a string instead of an integer.

Trying to append the slice itself instead of a value.

The append function adds the value 5 to the slice numbers.

2fill in blank

medium

Complete the code to append all elements from slice b to slice a.

Go

a := []int{1, 2}
b := []int{3, 4}
a = append(a, [1]...)
fmt.Println(a)

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

Aa

Bb

Cappend

D3

Attempts:

3 left

💡 Hint

Common Mistakes

Appending the slice without the spread operator, which causes a compile error.

Appending the wrong slice.

Using b... appends all elements from slice b to slice a.

3fill in blank

hard

Fix the error in the code to append the value 10 to the slice.

Go

var nums []int
nums = append([1], 10)
fmt.Println(nums)

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

Anums

B10

Cappend

Dnil

Attempts:

3 left

💡 Hint

Common Mistakes

Using nil instead of the slice variable as the first argument.

Trying to append to the value 10.

You must append to the slice variable nums, not to nil or other values.

4fill in blank

hard

Fill both blanks to create a new slice with squares of numbers greater than 3.

Go

nums := []int{1, 2, 3, 4, 5}
squares := []int{}
for _, n := range nums {
    if n [1] 3 {
        squares = append(squares, n[2]n)
    }
}
fmt.Println(squares)

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

A>

B*

C<

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using less than instead of greater than in the condition.

Using addition instead of multiplication for squaring.

The condition n > 3 filters numbers greater than 3, and n * n calculates their squares.

5fill in blank

hard

Fill all three blanks to create a map of numbers and their squares for numbers less than 5.

Go

nums := []int{1, 2, 3, 4, 5}
squares := map[int]int{}
for _, n := range nums {
    if n [1] 5 {
        squares[[2]] = n[3]n
    }
}
fmt.Println(squares)

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

A<

Bn

C*

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using greater than instead of less than in the condition.

Using addition instead of multiplication for the square.

Using the wrong key in the map.

The condition n < 5 filters numbers less than 5, n is the key, and n * n is the value in the map.