10.4.4.8 return

return is used to return program execution from the body of a function to the caller, possibly providing a value.

Implicitly returning from a void function is allowed. Also it is not required to use return as the last statement of a void function, i.e., an early return skipping over remaining statements is allowed.

return ::= "return" ";"
             | "return" expression ";"

For example:

void foo ()
{
  if (idle) return;
  world;
}

bool negate (bool b)
{
  return !b;
}