Null loop

Notice that in this example, a semicolon is placed directly after the closing parenthesis of the for loop. As you might already know, C does not require semicolons to follow for loops.

Usually, only the statements within the for loop are appended with semicolons. Putting the semicolon directly after the for loop and using no braces creates a null loop—literally, a loop that contains no programming statements.

In the preceding example, when the for loop executes, the variable x will be incremented , times with no processing occurring between increments. You might be wondering what null loops are used for. Most often, they are used for putting a pause in your program. However, there are many more uses for null loops. Find centralized, trusted content and collaborate around the technologies you use most.

Connect and share knowledge within a single location that is structured and easy to search. I cannot use strings or any form of string functions for this before anyone asks. Can anyone help?? As others have pointed out, your problem is with the inner loop.

You test for a space character but not for NULL, so it's iterating past the end of the last word because there is no space character after the last word. I'm not correcting the rest of your code because I presume this is a class project it looks like one so I'm limiting my answer to the scope of your question. It's because the inner loops don't check for the termination, they just continue looping even past the end of the string.

See e. For example:. If you use e. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow.

Learn more. For anyone uninterested in writing their own static null safety method you can use: commons-lang's org. For example:. Use, CollectionUtils. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Null check in an enhanced for loop Ask Question.

Asked 11 years, 11 months ago. Active 11 months ago. Viewed k times. What is the best way to guard against null in a for loop in Java? This seems ugly : if someList! Improve this question. You are probably better off throwing an NPE. GregMattes How February question is a duplicate of October question? Just need to use Collections. Add a comment. Active Oldest Votes. You should better verify where you get that list from.

An empty list is all you need, because an empty list won't fail. Improve this answer. Lawrence Dol OscarRyz OscarRyz k gold badges silver badges bronze badges. Note that Collections. Jon: I have always asked my self, what was the use of that emptyList java. And yes, there is a singleton instance that is returned for all calls to Collections. Why is it accepted answer? ChristopherWirt because it does answer the question :D — Tarik.

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