Function Overloading is a method to define multiple functions with the same name. But different tasks are performed based on the number, type of arguments contained in that function.

#include <iostream.h>
int add(int, int);
double add( double , double );
int add(int , int , int );
int main()
  {
    cout << "Addition of 2 integers::" 
              <

   Addition of 2 integers::13 
   Addition of 2 double integers::25.7 
   Addition of 3 integers::30 

In the above example there are multiple "add" functions, but with different arguments, types. So based on the type and arguments the respective function is called.