Null often pops up in legal and scientific contexts; it was originally used in Scottish law and still carries the meaning "having no legal or binding force," especially in the phrase "null and void."

NULL definition: 1. having no legal force: 2. with no value or effect: 3. (of a set or matrix) containing nothing…. Learn more.

Jun 12, 2018 · null is a fundamental concept in many programming languages. It is ubiquitous in all kinds of source code written in these languages. So it is essential to fully grasp the idea of null . We …

Null character, the zero-valued ASCII character, also designated by NUL, often used as a terminator, separator or filler. This symbol has no visual representation.

Oct 28, 2025 · JavaScript is unique to have two nullish values: null and undefined. Semantically, their difference is very minor: undefined represents the absence of a value, while null represents the …

NULL definition: without value, effect, consequence, or significance. See examples of null used in a sentence.

Jan 24, 2026 · By using the null-forgiving operator, you inform the compiler that passing null is expected and shouldn't generate a warning. You can also use the null-forgiving operator when you definitely …

POSIX requires NULL to be defined as an integer constant expression with the value 0 cast to void*.

A NULL value represents an unknown, missing, or inapplicable data in a database field. It is not a value itself, but a placeholder to indicate the absence of data.

Define null. null synonyms, null pronunciation, null translation, English dictionary definition of null. adj. 1. Having no legal force; invalid: render a contract null and void. 2. Of no consequence, effect, or value; …