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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.
{{Allcaps|yOuR tExT}} will (in most browsers) display lower- or mixed-case text in, and (in many browsers) permanently convert it to, full uppercase. Usage This template should not be used in citation templates such as Citation Style 1 and Citation Style 2 , because it includes markup that will pollute the COinS metadata they produce; see ...
Small caps are used in running text as a form of emphasis that is less dominant than all uppercase text, and as a method of emphasis or distinctiveness for text alongside or instead of italics, or when boldface is inappropriate. For example, the text "Text in small caps" appears as Text in small caps in small caps. Small caps can be used to ...
Some naming conventions limit whether letters may appear in uppercase or lowercase. Other conventions do not restrict letter case, but attach a well-defined interpretation based on letter case. Some naming conventions specify whether alphabetic, numeric, or alphanumeric characters may be used, and if so, in what sequence.
There is rarely anything to say about file extensions; instead, these should in almost all cases be redirects to an article about the file format, a list of file formats (e.g. for the many text-like formats) or a program using the file format (the sole or most common program, e.g. ".doc" → Microsoft Word).
The x must be lowercase in XML documents. The nnnn or hhhh may be any number of digits and may include leading zeros. The hhhh may mix uppercase and lowercase, though uppercase is the usual style. In contrast, a character entity reference refers to a character by the name of an entity which has the desired character as its replacement text.
Caps Lock (⇪ Caps Lock) is a button on a computer keyboard that causes all letters of bicameral scripts to be generated in capital letters. It is a toggle key: each press reverses the previous action. Some keyboards also implement a light to give visual feedback about whether it is on or off.
This changed as full support of ASCII became standard, allowing lower-case characters. Some Soviet computers, such as Radio-86RK, Vector-06C, Agat-7, use 7-bit encoding called KOI-7N2, where capital Cyrillic letters replace lower-case Latin letters in the ASCII table, so can display both alphabets, but all caps only.