What is return type?how can we use it?

[Sivakoti]

What is return type?how can we use it?

[wild wolf]

it is so complex a question . it accords to your needs and your definition. for example ,the funtion: int salary（）；then it will a type of integer .

[weaknessforcats]

The return type is used when you want your function to be an RVAL.

In this code:

int data = 10;

The 10 is an RVAL (the value is to the right of the = operator). data is the LVAL.

If the 10 need to be calculated, then you can use a function that returns an int:

int data = Calculate();

The compiler will call the function to get the int to assign to data. Calculate() is now an RVAL.

[whodgson]

Yes...and at its simplest it is demonstrated by functions.

int convert(double x)
{x/=12;
return x;}
 

double x is passed to convert(),converted to feet and returned as an int (the function type)

[donbock]

The starting point is with functions: what a function is and how it can be used. Let us know if you have questions about that.

Some languages (such as VisualBasic.NET, Pascal, Fortran, Ada) make a distinction between subroutines and functions. They consider a subroutine to be a callable block of code; while a function is a subroutine that also returns a value.

In C, both are called functions. However, a function that returns void is analogous to a subroutine.

You don't include a return value in a function definition for the fun of it -- you do it if and only if it makes sense to you for a value of some sort to be associated with the function. If you can't think of any useful value to return then define the function to return void.