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The Mathematical Alphanumeric Symbols block (U+1D400–U+1D7FF) contains Latin and Greek letters and decimal digits that enable mathematicians to denote different notions with different letter styles. The reserved code points (the "holes") in the alphabetic ranges up to U+1D551 duplicate characters in the Letterlike Symbols block. In order ...
volt-ampere reactive (var) electric charge: coulomb (C) electrical resistance: ohm (Ω) Ricci tensor: reciprocal square meter (m −2) radiancy: meter per second: gas constant: joule per mole per kelvin (J⋅mol −1 ⋅K −1) radius vector (position) meter (m) radius or distance meter (m)
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A later "advance" allowed longer variable names to be used for human comprehensibility, but where only the first few characters were significant. In some versions of BASIC such as TRS-80 Level 2 Basic, long names were allowed, but only the first two letters were significant.
Random variables are usually written in upper case Roman letters, such as or and so on. Random variables, in this context, usually refer to something in words, such as "the height of a subject" for a continuous variable, or "the number of cars in the school car park" for a discrete variable, or "the colour of the next bicycle" for a categorical variable.
In computer science, a literal is a textual representation (notation) of a value as it is written in source code. [1] [2] Almost all programming languages have notations for atomic values such as integers, floating-point numbers, and strings, and usually for Booleans and characters; some also have notations for elements of enumerated types and compound values such as arrays, records, and objects.
It is recommended to use {{var|1}} rather than {{var serif|1}} for "1" (numeral one), as it is usually more clearly distinguishable from "I" and "l" in sans-serif than serif fonts. {{ Var serif }} need not be used for variables that simply contain "I" or "l", only for cases in which readers are likely to be unable to distinguish them visually.
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