return in void function()

[chulio]

Hello,

i would like to ask when we have a function like:

void func(){
   /* code code code*/
   return;
}

Is it "better" to use return at the end of the function or to program it without using return ?

void func(){
   /* code code code*/
}

Thanks.

[Computergeek01]

The main reason to use "return" in a void function is to avoid executing the rest of the function in the case of an error or completion. Consider the following simple example:

#include <iostream>

void eval(int answr); //Forward declaration

int main()
{
   int answr;

   std::cout << "What is 2 + 2? ";
   std::cin >> answr;

   eval(answr);

   return 0;
}


void eval(int answr)
{
    if(answr != 4)
     {
         std::cout << "\nWRONG";
         return; //SKIP THE REST OF THE FUNCTION
      }
   else
   {
         std::cout << "\nCORRECT!";
   }

}

[shacktar]

Having a return statement as the last line in a void function exhibits the exact same behavior/execution time as simply excluding it.

[chulio]

Thanks for the useful information.