Function execution flow in Go - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to call the function greet.

Go

package main
import "fmt"
func greet() {
    fmt.Println("Hello!")
}
func main() {
    [1]()
}

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

Ahello

Bgreet

Cprint

Dsay

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong function name like 'print' or 'hello'.

Forgetting the parentheses after the function name.

The function greet is called by writing its name followed by parentheses: greet().

2fill in blank

medium

Complete the code to return the sum of two integers from the function add.

Go

package main
import "fmt"
func add(a int, b int) int {
    return [1]
}
func main() {
    fmt.Println(add(3, 4))
}

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

Aa + b

Ba - b

Ca * b

Da / b

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, which is a + b.

3fill in blank

hard

Fix the error in the function call to multiply.

Go

package main
import "fmt"
func multiply(x int, y int) int {
    return x * y
}
func main() {
    result := multiply[1]
    fmt.Println(result)
}

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

A(5, 6

B5, 6

C5, 6)

D(5, 6)

Attempts:

3 left

💡 Hint

Common Mistakes

Missing closing parenthesis.

Including only one parenthesis or none.

Function calls require parentheses around all arguments: multiply(5, 6).

4fill in blank

hard

Fill both blanks to create a function isEven that returns true if a number is even.

Go

package main
import "fmt"
func isEven(num int) bool {
    return num [1] 2 [2] 0
}
func main() {
    fmt.Println(isEven(4))
}

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

A%

B==

C!=

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using division (/) instead of modulus (%).

Using != instead of == for comparison.

To check if a number is even, use the modulus operator (%) to get the remainder and compare it to zero with ==.

5fill in blank

hard

Fill all three blanks to create a function filterPositive that returns a slice of positive numbers from input.

Go

package main
import "fmt"
func filterPositive(nums []int) []int {
    var result []int
    for _, [1] := range nums {
        if [2] [3] 0 {
            result = append(result, num)
        }
    }
    return result
}
func main() {
    fmt.Println(filterPositive([]int{-2, 3, 0, 5, -1}))
}

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

Anum

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong variable name in the loop or condition.

Using < instead of > in the condition.

The loop variable is num. The condition checks if num > 0 to keep positive numbers.