Question

What are the different forms of function return? Explain with example.

Answer 1

Different forms of User-defined Function declarations:

Function without return value and without parameter
The following program is an example of a function with no return and no arguments passed.
The name of the function is display( ), its return data type is void and it does not have any argument.

#include <iostream>
using namespace std;
void display( )
{
cout<<“Function without parameter and return value”;
}
int main()
{
display( ); // Function calling statement//
return(O);
}

Output :

Function without parameter and return value
A Function with return value and without parameter
The name of the function is display(), its return type is int and it does not have any argument. The return statement returns a value to the calling function and transfers the program control back to the calling statement.

#include <iostream>
using namespace std;
int display( )
{
int a, b, s;
cout<<“Enter 2 numbers:
cin>>a>>b;
s=a+b;
return s;
}
int main( )
{
int m=display( );
cout<<“\nThe Sum=”<<m;
return(0);
}
OUTPUT :
Enter 2 numbers: 10 30
The Sum = 40