Editing Case sensitivity (section)

==In programming languages==
Some [[programming languages]] are case-sensitive for their identifiers ([[C (programming language)|C]], [[C++]], [[Java (programming language)|Java]], [[C Sharp (programming language)|C#]], [[Verilog]],<ref name="k&r1e">{{cite book | last1 = Kernighan | first1 = Brian W. | author-link = Brian Kernighan | last2 = Ritchie | first2 = Dennis M. | author-link2 = Dennis Ritchie | chapter = Chapter 2: Types, Operators and Expressions | page = [https://archive.org/details/cprogramminglang00kern/page/33 33] | title = [[The C Programming Language]] | edition = 1st | publisher = Prentice Hall | date = February 1978 | location = Englewood Cliffs, NJ | isbn = 0-13-110163-3 }}</ref> [[Ruby (programming language)|Ruby]],<ref>{{cite book | last = Matsumoto | first = Yukihiro | author-link = Yukihiro Matsumoto | chapter = Chapter 2: Language Basics | page = [https://archive.org/details/rubyinnutshellde00mats/page/9 9] | title = Ruby in a nutshell | edition = 1st | publisher = O'Reilly Media | date = January 2002 | isbn = 0-596-00214-9 | chapter-url = https://archive.org/details/rubyinnutshellde00mats/page/9 }}</ref> [[Python (programming language)|Python]] and [[Swift (programming language)|Swift]]). Others are case-insensitive (i.e., not case-sensitive), such as [[ABAP]], [[Ada (programming language)|Ada]], most [[BASIC]]s (an exception being [[BBC BASIC]]), [[Common Lisp]], [[Fortran]], [[SQL]] (for the syntax, and for some vendor implementations, e.g. [[Microsoft SQL Server]], the data itself)<ref group='NB'>Although one can explicitly set a single database or column [[collation]] to be case-sensitive</ref> [[Pascal (programming language)|Pascal]], [[Rexx]] and [[Object REXX|ooRexx]].  There are also languages, such as [[Haskell (programming language)|Haskell]], [[Prolog]], and [[Go (programming language)|Go]], in which the capitalisation of an identifier encodes information about its [[Semantics (computer science)|semantics]]. Some other programming languages have varying case sensitivity; in [[PHP]], for example, variable names are case-sensitive but function names are not case-sensitive. This means that if a function is defined in lowercase, it can be called in uppercase, but if a variable is defined in lowercase, it cannot be referred to in uppercase. [[Nim (programming language)|Nim]] is case-insensitive and ignores underscores, as long as the first characters match.<ref>{{Cite web|url=https://nim-lang.github.io/Nim/manual.html#lexical-analysis-identifier-equality|title=Nim Manual: Identifier Equality|website=nim-lang.github.io|access-date=2019-04-27}}</ref>