Is there a single word meaning 'not null'?

Question

In if statements, I am used to seeing x != null, and reading it as "x is not null".

But in function names, having to say 'NotNull' or 'IsNotNull' to explain a similar state feels overly complicated. Not only because it is two or three words, but it also comes with the feeling of being a double negative used to express a positive concept.

What is a good word, hopefully not a long or compound word, which means the same as 'not null'?

Some ideas I've already brainstormed and rejected, and why:

• "Initialized" would not be great because in most programming languages you can can initialize a variable to be null.

• "something" might imply "not nothing", and so "not null" to you, but other people's interpretation may differ...

If there is no such word, then you can create one - your suggestions are welcome and I'm sure people will love to vote on their favorites.

Answer 1

In PHP there is a function named isset - I think there's no shorter version than this.

Answer 2

It is based on your preference I think, isset / is / set / exist / has / ...

But don't you think code readability is more important to understand and write, instead of shortening every word

Answer 3

VALUED

The caveat here is NULL may be considered a value in some languages, so universal use of VALUED as the antithesis of NULL is not appropriate.

In PHP however, VALUED cleanly opposes NULL.