Chapter 4 Function Declaration and Usage

What is a function prototype?

• A function call

• A function with no name

• A declaration of a function before main()

• A loop

Answer explanation

A function prototype tells the compiler about the function's name, return type, and parameters before it is used.

Which of the following is a valid function declaration?

• int sum(int a, int b);

• function sum(int a, int b);

• sum(int a, int b);

• int sum;

Answer explanation

This correctly defines the return type, function name, and parameter types.

Which of the following statements is true about return statements?

• All functions must return a value

• Only main() uses return

• void functions do not use return value

• You can return multiple values using return

Answer explanation

void means the function does not return anything, so no value is used with the return statement.

What will be the output of this code?

• 7

• 34

• Error

• Nothing

Answer explanation

The function add(3, 4) returns 7, which is then printed.

What is the name of the values passed into a function?

• Return type

• Variables

• Arguments or Parameters

• Function name

Answer explanation

Values passed into a function are called arguments or parameters.