Mattel IntelliVision II 5872 Manuel d'utilisateur télécharger pdf (Page 47)

In on-line exchanges, hackers tend to use decimal forms or improper

fractions (`3.5' or `7/2') rather than `typewriter style' mixed

fractions (`3-1/2'). The major motive here is probably that the former

are more readable in a monospaced font, together with a desire to

avoid the risk that the latter might be read as `three minus

one-half'. The decimal form is definitely preferred for fractions with

a terminating decimal representation; there may be some cultural

influence here from the high status of scientific notation.

Another on-line convention, used especially for very large or very

small numbers, is taken from C (which derived it from FORTRAN). This

is a form of `scientific notation' using `e' to replace `*10^'; for

example, one year is about 3e7 seconds long.

The tilde (~) is commonly used in a quantifying sense of

`approximately'; that is, ~50 means `about fifty'.

On Usenet and in the [126]MUD world, common C boolean, logical, and

relational operators such as |, &, ||, &&, !, ==, !=, >, <, >=, and =<

are often combined with English. The Pascal not-equals, <>, is also

recognized, and occasionally one sees /= for not-equals (from Ada,

Common Lisp, and Fortran 90). The use of prefix `!' as a loose synonym

for `not-' or `no-' is particularly common; thus, `!clue' is read

`no-clue' or `clueless'.

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Mattel IntelliVision II 5872 Manuel d'utilisateur Page 47