Return in c++

Question

can anyone plz tell me what is the difference between return,return 1,return 0

Answer 1

return : the name its self suggest that return something ..to function
let me explain you by example

when your write normal program

int main ()
{

return 0;
}

main () is integer value type to the operating system.

Therefore every main () should end with return 0 as you can see in above program , otherwise warning may occurs.
return 0 to main tell operating system program successful completed .

coming to function :
return plays an important role in function.

int foo()
{

return 2;
}

float fun()
{

return 1.23;
}

int main ()
{
float h=fun()
int m =foo();
cout<<foo();
cout <<fun();

return 0;
}

output
h= 1.23
m=2
2
1.23

above program gives u clear idea about return
note that void function no return type .
example:
void fun ()
{
}

coming to your question.
return :- plain return doesn't return any value

return value or expression :- which returns value or expression to function

Hope I answered your question....