chapter 5 Basic Concepts of Function in C++

What is the main purpose of using functions in a C++ program?

• To increase the size of the program

• To slow down the execution

• To divide the program into smaller parts

• To reduce readability

Answer explanation

Functions help organize code into smaller blocks that are easier to manage and reuse.

Which keyword is used to define a function in C++?

• define

• void

• function

• return

Answer explanation

The keyword void is used when a function does not return a value. It is part of the function definition.

How many times can a function be called in a C++ program?

• Only once

• Twice

• As many times as needed

• Never

Answer explanation

Functions can be called repeatedly to perform a task, which helps avoid writing the same code again

What will be the output of this code?

• Hello!

• Hello!Hello!

• Error

• Nothing

Answer explanation

The function greet() is called twice, so "Hello!" will be printed two times.

Which part of the function defines the data type of the returned value?

• Function body

• Function name

• Return type

• Parameters

Answer explanation

The return type (e.g., int, void, float) defines what kind of value the function will return.