Why operators are needed in Go - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add two numbers and print the result.

Go

package main
import "fmt"
func main() {
    sum := 5 [1] 3
    fmt.Println(sum)
}

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

A*

B-

C/

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using subtraction or multiplication instead of addition.

The plus operator + adds two numbers together.

2fill in blank

medium

Complete the code to check if a number is greater than 10.

Go

package main
import "fmt"
func main() {
    num := 15
    if num [1] 10 {
        fmt.Println("Number is greater than 10")
    }
}

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

A>

B==

C<

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using less than or equal instead of greater than.

The greater than operator > checks if the left value is bigger than the right.

3fill in blank

hard

Fix the error in the code to multiply two numbers correctly.

Go

package main
import "fmt"
func main() {
    a := 4
    b := 5
    product := a [1] b
    fmt.Println(product)
}

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

A*

B-

C+

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using addition or division instead of multiplication.

The multiplication operator * multiplies two numbers.

4fill in blank

hard

Fill both blanks to create a map of words and their lengths, including only words longer than 3 letters.

Go

package main
import "fmt"
func main() {
    words := []string{"go", "code", "fun", "learn"}
    lengths := map[string]int{
        [1]: len([2]),
    }
    fmt.Println(lengths)
}

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

A"code"

B"go"

Cwords[1]

Dwords[0]

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong index or mismatching key and value.

We use the word as the key and its length as the value. Here, "code" is the key and words[1] is the word to get length from.

5fill in blank

hard

Fill all three blanks to create a map of words and their lengths, filtering words longer than 2 letters.

Go

package main
import "fmt"
func main() {
    words := []string{"go", "code", "fun", "learn"}
    lengths := map[string]int{}
    for _, word := range words {
        if len(word) [3] 2 {
            lengths[[1]] = [2]
        }
    }
    fmt.Println(lengths)
}

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

A"CODE"

Blen(word)

C>

Dword

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong comparison operators or mismatching key and value.

The key is the word itself, the value is its length, and the condition checks if the length is greater than 2.