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011. null literal

VBScript

JScript

Perl

PHP

Python

Ruby

PowerShell

Scala

F#

C

C++

C++Builder

VC++

C#

Java

Objective-C

D

VB

VB.NET

Delphi

Pascal

can only be assigned to pointers:
nil

Ada

can only be assigned to access types:
null

PL/SQL

NULL

T-SQL