If so, just return -1.0 to indicate the failure. Otherwise, it will return the value of p.If you like GeeksforGeeks and would like to contribute, you can also write an article using Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.

We use cookies to ensure you have the best browsing experience on our website. To be on the safe side, you may check for iterLimit <= 0 at the rerurn statemnet. Its a piece of code from the vincenty Inverse Solution. As far as I understood Vincenty's formula, negative results (distances) may not occur. The content must be between 30 and 50000 characters. In addition, make sure that you document the fact that the function can return null. Your JavaScript source returns NaN to indicate that the calculation fails. But I assume that the value is not changed anywhere else. If iterLimit is 1, it will be decremented to 0, the comparison fails, and the while loop is left. The value of p can be nullable type, but the value of q must be non-nullable type. Can you post some code to see what you are trying to do?Okay. If you follow these rules, nulls are mostly harmless. The Null Coalescing Operator is the binary operator that can have either True of False two values. But I have to return NaN!

C++ Null Pointers - It is always a good practice to assign the pointer NULL to a pointer variable in case you do not have exact address to be assigned. However, the calling function must check the returned value to be >= 0.0.Yeah there is a do while loop, where in the while loop I check the expression.But you are not returning iterLimit.

503-250 Ferrand Drive Toronto Ontario, M3C 3G8 Canada You must return a value of the same type as declared in your C++ function:The code is OK. CodeProject, This is done at the time of

+1 416-849-8900 x 100 Are they all the same? A corollary of this is that a function which returns a collection should never return null. Just wondering when there is an expression to check Nan ie: _isnan there should be something to return the same.You cannot return a NaN as such e.g 1/0. There would be only a problem when iterLimit is already 0 when processing the while condition. This is in Java script* There is a decrement operator for the iterLimit prior to this in a while loop So your function is returning the result as floating point value (double or float). By using our site, you operator doesn't evaluate its right-hand operand if the left-hand operand evaluates to non-null. If a function can return NULL, think about whether this is a possibility, and whether that would cause problems later in your code. It is known as the null-coalescing operator that is used to define the default value for nullable reference or value types. Just wondering when there is an expression to check Nan ie: _isnan there should be something to return the same. returns the value of its left-hand operand if it isn't null; otherwise, it evaluates the right-hand operand and returns its result. findAllOldPeople() then an empty collection is best. I know it is a simple question.I have tried NULL, 0 But I guess it is always better to ask. Note; This is a follow-up article to a previous article with the title Why We Should Love 'null'.While the previous article focused on the general case of returning null from a function, this article is about the more special case of functions that return a list. The value of p can be nullable type, but the value of q must be non-nullable type. If the value of p is null, then it returns the value of q. ... Pay attention to functions that could return NULL. In c++ NULL is just a macro (see this link if you don't know what a macro is) that is defined to be 0. The null-coalescing operator ?? But I have to return NaN!