We're now at C++14. It's an empty char array, one that hasn't been assigned any elements. Like so: rev2023.5.1.43405. To check if a given string is empty or not, we can use the strlen() function in C. The strlen() function takes the string as an argument and returns the total number of characters in a given string, so if that function returns 0 then the given string is empty else it is not empty. If you want to check whether a string (that does exist) is empty, use the empty method instead: Thanks for contributing an answer to Stack Overflow! Thanks for contributing an answer to Stack Overflow! operator in C#, C# - How to deal with 404 error in JSON url in JSON.NET, Throw an error when the user enter null or empty string, How to compare True for Assert.AreEqual("",string.empty), how to remove empty strings from list object. But you cannot compare a string to NULL. How do I test if a string is empty in Objective-C? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. It's not a good idea to conflate them. Is it safe to publish research papers in cooperation with Russian academics? Why is it shorter than a normal address? What are the differences between a pointer variable and a reference variable? Thanks for contributing an answer to Stack Overflow! Does a password policy with a restriction of repeated characters increase security? How do I make the first letter of a string uppercase in JavaScript? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Can I use my Coinbase address to receive bitcoin? How to allow a std:string parameter to be NULL? The strcmp() function at Line 9 compares the two char arrays. You'll get a compilation error if put in something other than a pointer to char. Did the drapes in old theatres actually say "ASBESTOS" on them? Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. It's been answered to death, but null means no value, not initialized. The safest way to check for an empty or null string is using string.IsNullOrEmpty. A boy can regenerate, so demons eat him for years. String.IsNullOrEmpty(String) Method (System) | Microsoft Learn
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