What does non-void function does not return a value mean?
The analyzer has detected a non-void function with an execution path that does not return a value. Such a function results in undefined behavior. Particularly, if during the function execution an exception is thrown and is not caught in the body of the same function, there will be no undefined behavior.
Does a void function return a value?
Void functions are created and used just like value-returning functions except they do not return a value after the function executes. In lieu of a data type, void functions use the keyword “void.” A void function performs a task, and then control returns back to the caller–but, it does not return a value.
What is a non-void function?
If the function is non-void,it means it has to return something before reaching the end of function block[ _} ]. So, when we give only if and else-if statements the compiler cannot tell from that code,that any of these statements will be evaluated to true and return something.
Should function always return a value?
No. A function does not need to return a value always. If the return type is void, then return is not needed. If the return type is non-void such as int, then return is strictly needed.
What happens if you forgot the return statement in a non-void function?
C99 and C++ standards don’t require functions to return a value. The missing return statement in a value-returning function will be defined (to return 0 ) only in the main function.
What is non-void function in C++?
We know a function has a non-void return type by looking for a return type in the first line of the function definition or a return statement in the body of the function. …
How do you return from a void function?
A void function cannot return any values. But we can use the return statement. It indicates that the function is terminated.
How do you return a void value?
You declare a method’s return type in its method declaration. Within the body of the method, you use the return statement to return the value. Any method declared void doesn’t return a value. It does not need to contain a return statement, but it may do so.
What is a non-void return type?
Non-void methods differ from void methods in that they give something back. Since the method sum has a return type of int the return line is required to return a value of this type. A non-void method’s return line can be just about anything as long the code after the return matches the return type.
What is a void and non-void function?
1. If your function has no reason to return something, it shouldn’t return anything, i.e., it should return void . There is no point in giving a function which doesn’t produce any result an artificial return value.
What is the purpose of returning value from function?
A return is a value that a function returns to the calling script or function when it completes its task. A return value can be any one of the four variable types: handle, integer, object, or string. The type of value your function returns depends largely on the task it performs.
Should a function contain a return statement if it does not return a value?
A value-returning function should include a return statement, containing an expression. If an expression is not given on a return statement in a function declared with a non- void return type, the compiler issues a warning message. For a function of return type void , a return statement is not strictly necessary.
Why is my function returning an int instead of a void?
This warning also happens if you forget to add a return statement as the last statement: If you don’t specify the return type of a function it defaults to int not to void so these are also errors:
What is the warning when a function returns a non-void?
warning : ‘return’ with no value, in function returning non-void. A return with no value is similar to what I showed. The message also tells you that if the function returns ‘void’, it would not give the warning.
Why can’t I return a value from a function?
A return with no value is similar to what I showed. The message also tells you that if the function returns ‘void’, it would not give the warning. But because the function is supposed to return a value but your ‘return’ statement didn’t, you have a problem. This is often indicative of ancient code.
Can a return statement have an expression in a void function?
A return statement with an expression shall not appear in a function whose return type is void. A return statement with an expression shall not appear in a function whose return type is void. A return statement without an expression shall only appear in a function whose return type is void.