Practical use cases in Go - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print "Hello, World!" in Go.

Go

package main

import "fmt"

func main() {
    fmt.[1]("Hello, World!")
}

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

APrint

BPrintf

CPrintln

DPrintfln

Attempts:

3 left

💡 Hint

Common Mistakes

Using Print instead of Println, which does not add a new line.

Using a non-existent function like Printfln.

The Println function prints the text followed by a new line.

2fill in blank

medium

Complete the code to declare a variable named "count" of type int with value 10.

Go

package main

func main() {
    var count [1] = 10
}

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

Aint

Bstring

Cfloat64

Dbool

Attempts:

3 left

💡 Hint

Common Mistakes

Using string type for a number.

Using float64 when an integer is intended.

The variable count is declared as an integer using int type.

3fill in blank

hard

Fix the error in the code to correctly create a slice of strings named "fruits".

Go

package main

func main() {
    fruits := [1]{"apple", "banana", "cherry"}
}

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

A[]string

Bmap

Cslice

Darray

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'array' or 'slice' as a type name, which are not valid Go types.

Using 'map' which is a key-value structure.

In Go, a slice of strings is declared as []string.

4fill in blank

hard

Fill both blanks to create a map from string to int and add a key-value pair.

Go

package main

func main() {
    ages := make(map[string][1])
    ages["Alice"] = [2]
}

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

Aint

B25

Cstring

D30

Attempts:

3 left

💡 Hint

Common Mistakes

Using string as the map value type but assigning an integer.

Assigning a string value instead of an integer.

The map stores integers as values, so the type is int. The value assigned to "Alice" is 25.

5fill in blank

hard

Fill all three blanks to define a function that returns the sum of two integers.

Go

package main

func [1](a [2], b [2]) [3] {
    return a + b
}

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

Aadd

Bint

Dsum

Attempts:

3 left

💡 Hint

Common Mistakes

Using different types for parameters and return value.

Using a function name that does not match the operation.

The function is named add, takes two integers, and returns an integer.