Array initialization in C - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an integer array named numbers with 5 elements.

C

int numbers[[1]];

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

A1

B10

C0

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Leaving the brackets empty, which is not allowed in C for array declaration.

Using zero or negative numbers as array size.

The array size must be specified inside the square brackets. Here, 5 means the array can hold 5 integers.

2fill in blank

medium

Complete the code to initialize the array with values 1, 2, 3, 4, 5.

C

int numbers[5] = [1];

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A[1, 2, 3, 4, 5]

B{1, 2, 3, 4, 5}

C(1, 2, 3, 4, 5)

D<1, 2, 3, 4, 5>

Attempts:

3 left

💡 Hint

Common Mistakes

Using square brackets or parentheses instead of curly braces.

Missing commas between values.

Arrays in C are initialized using curly braces with comma-separated values.

3fill in blank

hard

Fix the error in the array initialization to correctly initialize an array of 3 floats.

C

float values[3] = [1];

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A{1.0, 2.0, 3.0}

B(1.0, 2.0, 3.0)

C[1.0, 2.0, 3.0]

D1.0, 2.0, 3.0

Attempts:

3 left

💡 Hint

Common Mistakes

Using parentheses or square brackets instead of curly braces.

Not enclosing the values in any brackets.

Float arrays are initialized with curly braces containing float values separated by commas.

4fill in blank

hard

Fill both blanks to declare and initialize an array of characters with the letters 'a', 'b', 'c'.

C

char letters[[1]] = [2];

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A3

B{'a', 'b', 'c'}

C{"a", "b", "c"}

D4

Attempts:

3 left

💡 Hint

Common Mistakes

Using double quotes for characters instead of single quotes.

Mismatch between array size and number of elements.

The array size is 3 for three characters, and characters are enclosed in single quotes inside curly braces.

5fill in blank

hard

Fill all three blanks to declare and initialize an integer array with values 10, 20, 30, and access the second element.

C

int arr[[1]] = [2];
int second = arr[[3]];

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

A3

B{10, 20, 30}

C1

D2

Attempts:

3 left

💡 Hint

Common Mistakes

Using index 2 to access the second element instead of 1.

Mismatch between array size and number of elements.

The array size is 3, initialized with three values. The second element is at index 1 because C arrays start at 0.