null

1. Maths

a. quantitatively zero

b. relating to zero

c. (of a set) having no members

d. (of a sequence) having zero as a limit

2. Physics involving measurement in which an instrument has a zero reading, as with a Wheatstone bridge

Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

null

[nəl]

(mathematics)

Indicating that an object is nonexistent or a quantity is zero.

(navigation)

The azimuth or elevation reading on a navigational device indicated by minimum signal output.

Any of the nodal points on the radiation patterns of some antennas.

null

(programming)

A special value used in several languages to represent the thing referred to by an uninitialised pointer.

<database> A special value that may be stored in some database columns to represent an unknown, missing, not applicable, or undefined value. Nulls are treated completely differently from ordinary values when evaluating SQL expressions and there are several SQL constructs for dealing with nulls.

This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

null

A character that is all 0 bits. Also written as "NUL," it is the first character in the ASCII and EBCDIC data codes. In hex, it displays and prints as 00; in decimal, it may appear as a single zero in a chart of codes, but displays and prints as a blank space.

Nulls are naturally found in binary numbers when a byte contains all zeros, and they are used to pad fields (see padding). A null may function as a delimiter; for example, in C/C++, a null character is inserted at the end of a character string to mark the end of the text.

The Null Is the First

Note the first character at the top of this chart of ASCII characters. The 00 means 0000-0000 bits.

Copyright © 1981-2025 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.

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References in periodicals archive

A: The fact that the sale was declared null and void does not prevent the court from relying on consideration stated in the deed of sale to determine the actual amount paid by the buyer for the purpose of preventing unjust enrichment.

The evil of undervaluation

Accordingly the stipulation is null and void to the extent to which they increased the interest in excess of the principal amount.

Ask AJ

In a Channel 2 interview in January, Netanyahu said that the Bar Ilan speech was not null and void, "but the Palestinians have emptied it of content.

Netanyahu: Bar Ilan Speech is Dead

It quotes the United Nations Security Council Resolution 478 to the effect that "all legislative and administrative measures and actions taken by Israel, the occupying Power, which have altered or purport to alter the character and the status of the Holy City of Jerusalem, and in particular, the recent 'basic law' on Jerusalem, are null and void."

PLO advises journalists to use the term Al-Aqsa Mosque Compound instead Temple Mount

The law of celibacy for diocesan priests is null and void and its enforcement is immoral According to what is taught in Catholic ethics, a human law that results in injustice is null and void.

An immoral law

Federal High Court, Abuja, said that any Islamic banking licence issued by the Central Bank of Nigeria is "unlawful, illegal, ultra vires, null and void."

Nigerian court declares Islamic banking illegal

Salhab said Khamenei's condemnation of the STL's findings as null and void was aimed against the US and certain Lebanese parties

Khamenei remarks harm Saudi-Syrian work - Salhab

The Coleshill boss says he has been left 'disgusted' by the decision to declare their Aspire Midland Alliance fixture against Friar Lane as 'null and void'.

Coleshill left fuming at 'lost' fixture

"This letter is incompatible with articles 29, 31, 33, 40 of the Transitional Constitution" dealing with fundamental rights, akol told the official SUNA, adding that the SPLM-DC is demanding the constitutional court to declare null and void the contested decision because of its unconstitutionality.

SPLM-DC to lodge constitutional complaint against South Sudan government

They fled after hashish was found in their car, but their lawyer argued that their arrest was null and void because it took police more than 48 hours to track them down.

'Drug smugglers' arrest contested