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Boolean values: Difference between revisions
Add Avail entry
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=={{header|AutoHotkey}}==
When an expression is required to evaluate to true or false (such as an <code>IF</code>-statement), a blank or zero result is considered false and all other results are considered true. Operators such as <code>NOT</code>/<code>AND</code>/<code>OR</code>/<code>></code>/<code>=</code>/<code><</code> automatically produce a true or false value: they yield 1 for true and 0 for false. A variable can be used to hold a false value simply by making it blank or assigning 0 to it. The words 'true' and 'false' are built-in variables containing 1 and 0. They can be used to make a script more readable.
=={{header|Avail}}==
While Avail has many methods for handling booleans, <code>boolean</code> itself is simply an enumeration type of the atoms <code>true</code> and <code>false</code>. This enumeration and these atoms are only special ''by convention'' of being used for the logical operations provided by the standard library. It would be perfectly possible to define an entirely new boolean system with new types and atoms (or values).
=={{header|AWK}}==
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