Some of the common examples of character sets which are extensions of ASCII are the ISO 8859 series, e.g. Most of these extensions of ASCII utilized the numeric values from 128 to 255 for the additional characters, specific to the region. Each extension of the ASCII character set was catering to demands of a particular region/culture’s requirement of text representations. The ASCII character set included only the commonly used Latin characters and control characters. Later ASCII and its extensions were adopted by most of the OSs. In the initial days of computing each OS would support a particular character set and the most commonly supported character sets used to be ASCII or EBCDIC (Extended Binary Coded Decimal Interchange Code). These are not having a print position, but give effect to position of next character or some such function. we have characters for a carriage-return, line-feed, form-feed, tab, bell etc. Character sets also include control characters. Not all characters in a character set are printable. The most commonly known character set is the ASCII (American Standard Code for Information Interchange) character set, which assigns only 128 characters (including the control characters) to the numeric values in the range from 0 - 127. There are various character sets available. What is a character set? A character set is a collection of a unit of text(character), which are assigned some unique numeric value. The char data type is simply a numeric value of the character from a character set. How is text data represented? The text data is represented as sequence of characters. The char data type in a programming language is used to represent a unit of text.
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