Constants and literals in C++ - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a constant integer named MAX with value 100.

C++

const int MAX = [1];

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

A100

B10.0

Cmax

D"100"

Attempts:

3 left

💡 Hint

Common Mistakes

Using quotes around numbers, which makes them strings.

Using a variable name instead of a literal value.

The constant integer MAX is assigned the literal value 100 without quotes.

2fill in blank

medium

Complete the code to declare a constant floating-point number PI with value 3.14.

C++

const double PI = [1];

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

A3.14

B3,14

C"3.14"

Dpi

Attempts:

3 left

💡 Hint

Common Mistakes

Using a comma instead of a dot for decimals.

Putting the number inside quotes, making it a string.

The constant PI is assigned the floating-point literal 3.14 using a dot as decimal separator.

3fill in blank

hard

Fix the error in the code to declare a constant character named LETTER with value 'A'.

C++

const char LETTER = [1];

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

Aletter

B"A"

CA

D'A'

Attempts:

3 left

💡 Hint

Common Mistakes

Using double quotes which create string literals.

Using unquoted letters which cause errors.

Character literals use single quotes in C++.

4fill in blank

hard

Complete the code to declare a constant boolean named IS_READY with value true.

C++

const bool IS_READY = [1];

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

A"true"

Btrue

Cfalse

DTrue

Attempts:

3 left

💡 Hint

Common Mistakes

Using capitalized True which is invalid in C++.

Using quotes which make it a string.

Boolean constants use lowercase true or false without quotes in C++.

5fill in blank

hard

Complete the code to declare a constant string named GREETING with value "Hello".

C++

const std::string GREETING = [1];

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

AHello

B'Hello'

C"Hello"

Dstd::string("Hello")

Attempts:

3 left

💡 Hint

Common Mistakes

Using single quotes which are for characters.

Using unquoted words which cause errors.

String literals in C++ are enclosed in double quotes. Using std::string constructor is also valid but here the literal is expected.