Type modifiers in C++ - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a type modifier in C++?

A type modifier changes the meaning of a basic data type to alter its size or behavior. Examples include signed, unsigned, long, and short.

beginner

What does the unsigned modifier do when applied to an integer type?

It makes the integer type store only non-negative values (zero and positive numbers), effectively doubling the maximum positive range by removing negative values.

beginner

How does the long modifier affect an integer type?

The long modifier increases the size of the integer type, allowing it to store larger numbers than the default int.

beginner

What is the difference between signed and unsigned modifiers?

signed allows storing both negative and positive numbers, while unsigned stores only zero and positive numbers.

intermediate

Can you combine multiple type modifiers? Give an example.

Yes, you can combine them. For example, unsigned long int means an integer type that is both unsigned and long, allowing only positive large numbers.

Which type modifier allows only non-negative integer values?

A short

B signed

C long

D unsigned

The unsigned modifier restricts the integer to non-negative values only.

What does the long modifier do to an integer type?

A Increases its size to store larger numbers

B Makes it store only negative numbers

C Decreases its size

D Changes it to a floating-point type

The long modifier increases the size of the integer type to hold larger values.

Which of these is a valid combination of type modifiers?

A signed float

B unsigned short int

C long double int

D unsigned char long

unsigned short int is valid. signed float and long double int are invalid combinations.

What is the default sign of an int if no modifier is specified?

A unsigned

B short

C signed

D long

By default, int is signed, meaning it can hold negative and positive values.

Which modifier would you use to store very large integer values?

A long

B unsigned

C short

D signed

The long modifier increases the size of the integer type to store larger values.

Explain what type modifiers are and list the common ones used with integer types in C++.

Think about how you can change the size or sign of numbers.

Describe how combining type modifiers affects the data type, giving an example.

Consider how two modifiers together change the range of values.