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."

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 …

Oct 28, 2025 · The null keyword refers to the null primitive value, which represents the intentional absence of any object value.

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.

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

Feb 16, 2019 · ! is the null-forgiving operator, telling the compiler that, even though it normally wouldn't allow it, it should look the other way and allow it anyway, because we know better. null! itself has little …

Jan 23, 2025 · null is an intentionally empty value, often used to indicate that something has no value at the moment. undefined means that a variable has been declared but hasn’t been assigned a value yet.

Sep 7, 2025 · The concept of null and its significance in computing with our comprehensive definition, examples, and explanations. Learn how null differs from zero and empty.

SQL IFNULL (), ISNULL (), COALESCE (), and NVL () Functions Look at the following "Products" table: ... Suppose that the "UnitsOnOrder" column is optional, and may contain NULL values. Look at the …

Aug 14, 2024 · Yet, null fills an important role in denoting missing information that is hard to eliminate from language design. Understanding correct and thoughtful usage of null is key to avoiding its pitfalls.