C++ Functions: Points to Remember

Points to Remember:

A large program can typically be split into smaller sized blocks called as functions.

Functions can be classified into Pre-defined or Built-in or Library Functions and User-defined Functions.

User-defined functions are created by the user.

The void function tells the compiler that the function returns nothing.

The return statement returns a value to the calling function and transfers the program control back to the calling function.

Default the data type of a function in C++ is of type int.

A function that calls itself is known as recursive function.

Scope refers to the accessibility of a variable.

There are four types of Scopes. They are: Local scope, Function scope, File scope and Class scope.

The scope operator (::) reveals the hidden scope of a variable.