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(C++) return

Keyword that ends a function. Depending on the function, return might return a value.

const int Square(const int x)

{

const int solution = x * x;

return solution;

}

If a function has no return value (that is, a return type of void), one can omit the final return.

#include <iostream>

void SayHello()

{

std::cout << "Hello" << std::endl;

//return; //No need to

}

Exception: main

The function main is special. It returns an integer error code of the program, where a zero denotes a no-failure run. When main's closing bracket is reached, the effect is equivalent to (Standard, 3.6.1.5):

return 0;

Therefore, the following two pieces of code are equivalent:

int main() {}

int main() { return 0; }

Go back to Richel Bilderbeek's C++ page.

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