Variable declaration and initialization in C++ - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an integer variable named age and initialize it with 25.

C++

int [1] = 25;

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

Aage

Bnumber

Cvalue

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name that is not descriptive.

Forgetting to initialize the variable.

The variable name age is used to declare and initialize the integer variable.

2fill in blank

medium

Complete the code to declare a floating-point variable named price and initialize it with 19.99.

C++

float [1] = 19.99f;

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

Avalue

Bprice

Camount

Dcost

Attempts:

3 left

💡 Hint

Common Mistakes

Using an integer type instead of float.

Forgetting the 'f' suffix for float literals.

The variable price is declared as a float and initialized with 19.99.

3fill in blank

hard

Fix the error in the code by completing the variable declaration for a character named grade initialized with 'A'.

C++

char [1] = 'A';

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

Aletter

Bscore

Cmark

Dgrade

Attempts:

3 left

💡 Hint

Common Mistakes

Using double quotes instead of single quotes for char.

Using an incorrect variable name.

The variable grade is declared as a char and initialized with the character 'A'.

4fill in blank

hard

Fill both blanks to declare a boolean variable named isOpen and initialize it with true.

C++

bool [1] = [2];

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

AisOpen

Bfalse

Ctrue

Dopen

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect variable names.

Assigning a string instead of a boolean value.

The variable isOpen is declared as a bool and initialized with true.

5fill in blank

hard

Fill both blanks to declare a constant integer named MAX_USERS initialized with 100.

C++

const int [1] = [2];

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

AMAX_USERS

B100

DmaxUsers

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase variable names for constants.

Adding unnecessary suffixes to integer literals.

The constant integer MAX_USERS is declared and initialized with 100. The third blank is empty because no suffix is needed.