C++ allows function overloading by having multiple definitions for the same function name within the same scope, as long as the definitions differ in the types and/or number of arguments. The function definitions cannot be overloaded based solely on return type. Function overloading allows creating multiple versions of a function that perform similar operations on different data types.

1. C++ Overloading (Operator and Function)

2. Function Overloading in C++
You can have multiple definitions for the same
function name in the same scope. The definition of the
function must differ from each other by the types
and/or the number of arguments in the argument list.
You cannot overload function declarations that differ
only by return type.