Array declaration in Go - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an array of 5 integers.

Go

[1] numbers [5]int

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

Avar

B=

C:=

Dconst

Attempts:

3 left

💡 Hint

Common Mistakes

Using := to declare an array type

Using = sign between variable name and type

Using const keyword for array declaration

In Go, to declare an array variable, you use var followed by the variable name, then the type. The equal sign = is not used here; instead, you just write the type after the variable name. So the correct syntax is var numbers [5]int.

2fill in blank

medium

Complete the code to declare and initialize an array of 3 strings.

Go

var fruits = [1]string{"apple", "banana", "cherry"}

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

A[]

B[3]

Cmake

D{}

Attempts:

3 left

💡 Hint

Common Mistakes

Using []string instead of [3]string for array

Using make function for array initialization

Using {} without type declaration

To declare and initialize an array of 3 strings, you specify the size in square brackets before the type, like [3]string. This tells Go the array has exactly 3 elements.

3fill in blank

hard

Fix the error in the array declaration to create an array of 4 floats.

Go

var values = [1]float64{1.1, 2.2, 3.3, 4.4}

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

A[]

B(4)

C[4]

D{4}

Attempts:

3 left

💡 Hint

Common Mistakes

Using []float64 which declares a slice, not an array

Using parentheses or braces for size

Omitting the size

Arrays in Go require the size inside square brackets before the type. So [4]float64 declares an array of 4 floats. Using []float64 would declare a slice, which is different.

4fill in blank

hard

Fill the blank to declare an array of 2 booleans and initialize it with true and false.

Go

var flags [1]bool = {true, false}

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

A[2]

B[3]

C[]

D{}

Attempts:

3 left

💡 Hint

Common Mistakes

Using []bool which declares a slice

Using parentheses instead of curly braces for initialization

Mismatching array size and number of elements

The array size must be specified as [2] before the type. The initialization uses curly braces {} with the values inside. So the correct declaration is var flags [2]bool = {true, false}.

5fill in blank

hard

Fill both blanks to declare and initialize an array of 3 integers with values 10, 20, and 30.

Go

var nums [1]int = [2]

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

A[3]

B[4]

C{10, 20, 30}

D{10, 20, 30, 40}

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong array size

Including more elements than the size

Using slice syntax instead of array

The array size must be [3] before the type. The initialization uses curly braces with the values inside. The correct initialization is {10, 20, 30}. The extra option {10, 20, 30, 40} is a distractor and should not be used.