Array limitations in Go - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an array of 5 integers.

Go

var numbers [[1]]int

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

A5

B0

C10

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 as the size, which creates an array of zero length.

Using a variable instead of a constant for the array size.

The number inside the square brackets specifies the fixed size of the array. Here, 5 means the array can hold exactly 5 integers.

2fill in blank

medium

Complete the code to access the third element of the array named 'data'.

Go

value := data[[1]]

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A2

B3

C1

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using 3 as the index, which is actually the fourth element.

Using 1 or 0 which refer to earlier elements.

Array indices in Go start at 0, so the third element is at index 2.

3fill in blank

hard

Fix the error in the code to declare an array with a variable size 'n'.

Go

var arr [[1]]int

// n is a variable
n := 10

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

An

Bvar n

C10

Dlen(arr)

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable 'n' directly as the array size.

Trying to use len(arr) before arr is declared.

Array sizes in Go must be constants known at compile time. Using a variable like 'n' is not allowed. Use a constant or literal instead.

4fill in blank

hard

Fill both blanks to create a fixed-size array and assign a value to its first element.

Go

var arr [[1]]int
arr[[2]] = 100

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

A4

B5

C0

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 as the array size.

Using 1 as the first element index.

The array size must be a constant (5 here). The first element index is 0.

5fill in blank

hard

Fill all three blanks to declare an array, assign a value, and print the length.

Go

var arr [[1]]int
arr[[2]] = 42
fmt.Println(len(arr) == [3])

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

A3

B0

C5

D4

Attempts:

3 left

💡 Hint

Common Mistakes

Using an index equal to the size (out of bounds).

Confusing array length with last index.

The array size is 5, the first element index is 0, and the length of the array is 5.