You can use strlen function to check for the string length. You'll get a compilation error if put in something other than a pointer to char. What should I follow, if two altimeters show different altitudes? An empty string has a single element, the null character, '\0'. Boolean algebra of the lattice of subspaces of a vector space? It depends on what you mean by "empty". I can't see a temporary in. Ubuntu won't accept my choice of password. FWIW, I found that mixing "" and String.Empty doesn't work: In particular, if you use $.trim to get the value of an empty DOM input field, then compare it to String.Empty, you get false. It's extremely obfuscated though :-) Making str (a pointer to) an empty string is done with str = ""; (or with str = "\0";, which will make str point to an array of two zero bytes).. no high characters in the string). Furthermore, most often you want a value to be assigned. It's just absent any elements. By initializing to null, you can potentially miss code paths that don't assign a value. This avoids the loop by creating a list of booleans showing where x is not empty. Did the Golden Gate Bridge 'flatten' under the weight of 300,000 people in 1987? Constant values are allowed in cases, String.Empty is a field and could be altered at run time. He also rips off an arm to use as a sword. Is it safe to publish research papers in cooperation with Russian academics? In C language strings are terminated with a null character \0, so we can check if a given string is empty or not by verifying if a string contains the first character is \0. Connect and share knowledge within a single location that is structured and easy to search. Why don't we use the 7805 for car phone chargers? Was Aristarchus the first to propose heliocentrism? Canadian of Polish descent travel to Poland with Canadian passport. To test whether the value of a string is either null or String.Empty, use the IsNullOrEmpty method. In your case, check it against 0. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. Why refined oil is cheaper than cold press oil? It is equivalent to the following code: You can use the IsNullOrWhiteSpace method to test whether a string is null, its value is String.Empty, or it consists only of white-space characters. To learn more, see our tips on writing great answers. string.IsNullOrEmpty (string value); Additionally, since .NET 4.0 there's a new method that goes a bit farther: // Indicates whether a specified string is null, empty, or consists only of white-space characters.
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