A void function can do return We can simply write return statement in a void fun(). The name is preceded by the word "void," which is the type.The void can also appear in the parameter list part of the code to indicate the function takes no actual parameters.
Some of cases are listed below. Le mot-clé void peut être utilisé là où se place habituellement le type de retour d'une fonction, comme int pour un entier ou string pour une chaîne de caractères.Lorsque le programmeur écrit void, cela permet d'indiquer que la fonction ne renvoie rien.C'est ce qu'on appelle une procédure dans d'autres langages, comme Pascal et Visual Basic. We cannot return values but there is something we can surely return from void functions.

Cet opérateur permet d'évaluer des expressions retournant une valeur là où on attend une expression qui vaut undefined.
The void keyword is used only in function declarations. L'opérateur void est souvent utilisé pour obtenir la valeur undefined, généralement avec "void(0)" (qui est l'équivalent de "void 0"). Utilisation. A void function uses a heading that names the function followed by a pair of parentheses. Void functions, also called nonvalue-returning functions, are used just like value-returning functions except void return types do not return a value when the function is executed. Ce tableau de compatibilité a été généré à partir de données structurées. True, but not completely. Si vous souhaitez contribuer à ces données, n'hésitez pas à envoyer une In C, the code takes the form:Note that the parentheses that follow the function name are not optional in any case.The third use of void is a pointer declaration that equates to a pointer to something left unspecified, which is useful to programmers who write functions that store or pass pointers without using them. The void function call is a …

C++ can take the empty parentheses, but C requires the word "void" in this usage. You can call any function from any other function, and they don't even have to be 'void' type, you could have them return an int, a float, a char or any other data type. The only reason to have a return in a void function would be to exit early due to some conditional statement: void foo(int y) { if(y == 0) return; // do stuff with y } As unwind said: when the code ends, it ends. No need for an explicit return at the end. Void Function: when must return more than one value or modify any of the caller's arguments; Void Function: when must perform I/O; Void Function: when in doubt, can recode any value-returning function as void function by adding additional outgoing parameter; Value-returning Function: when only … e à le faire après votre première connexion. ThoughtCo uses cookies to provide you with a great user experience and for our Array as a Function Return Type and Method ParameterHow to Return Multiple Values From a Delphi FunctionHow to Use the RAND and RANDBETWEEN Functions in Excel You can call a function from setup() or loop() - both of these are functions (or as you incorrectly call them, void functions (all he void means is nothing is returned when the function ends)). The void function call is a stand-alone statement.

Void functions, also called nonvalue-returning functions, are used just like value-returning functions except void return types do not return a value when the function is executed. A void pointer points to objects of any data type. void expression Description. Eventually, it must be cast to another pointer before it is dereferenced. Void functions are “void” due to the fact that they are not supposed to return values.