If in a program their are two function which share same number of arguments ,then function overloading work ?

Answer 1

At least in java you overload methods with different parameters

It shares same number of arguments however they differ in data type.

void myFun(int x) {}
void myFun(double x){}
void myFun(double x, int y) {}

Answer 2

Overloading works when there are two functions with same name but-

1) differ in argument types
2) differ in number of arguments

You cannot overload a function just by changing the return type.