Why arrays are needed in C Sharp (C#) - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an array of integers.

C Sharp (C#)

int[] numbers = new int[[1]];

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

Aarray

Bnumber

Cint

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name instead of a number for the size.

Using the type name instead of a number.

The number inside the brackets specifies the size of the array, which is 5 here.

2fill in blank

medium

Complete the code to access the first element of the array.

C Sharp (C#)

int firstNumber = numbers[1];

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

A[0]

B(0)

C{0}

D<0>

Attempts:

3 left

💡 Hint

Common Mistakes

Using parentheses instead of square brackets.

Using curly braces or angle brackets.

Arrays in C# use square brackets to access elements by index, starting at 0.

3fill in blank

hard

Fix the error in the code to assign a value to the second element of the array.

C Sharp (C#)

numbers[1] = 10;

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

A[1]

B(1)

C<1>

D{1}

Attempts:

3 left

💡 Hint

Common Mistakes

Using parentheses or other brackets instead of square brackets.

To assign a value to an array element, use square brackets with the index.

4fill in blank

hard

Fill both blanks to create an array of strings with 3 elements.

C Sharp (C#)

string[] fruits = new string[[1]] {"apple", "banana", [2];

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

A3

B"orange"

C"grape"

D2

Attempts:

3 left

💡 Hint

Common Mistakes

Mismatch between array size and number of elements.

Missing quotes around string elements.

The array size is 3, and the third element is "orange".

5fill in blank

hard

Fill all three blanks to create an array of doubles and assign values.

C Sharp (C#)

double[] temperatures = new double[[1]] { [2], [3], 23.5 };

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

A3

B20.0

C18.7

D2

Attempts:

3 left

💡 Hint

Common Mistakes

Using integer values without decimal points.

Mismatch between size and number of elements.

The array size is 3, and the first two values are 20.0 and 18.7.