Boolean values: Difference between revisions
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<syntaxhighlight lang="rockstar">Alice was right.
Bob was wrong.</syntaxhighlight>
=={{header|RPL}}==
There is no boolean variable type in RPL. Boolean values are real numbers, zero meaning 'FALSE' and any other value meaning 'TRUE'; built-in boolean operators and functions always return 1 for TRUE.
RPL users have also access to boolean registers named flags, identified by a number, that can be cleared, set or tested.
{{works with|Halcyon Calc|4.2.7}}
1 == 1
1 == 2
≪ IF 42 THEN "TRUE" ELSE "FALSE" END ≫ EVAL
14 CF 14 FS?
14 SF 14 FS?
{{out}}
<pre>
5: 1
4: 0
3: "TRUE"
2: 0
1: 1
</pre>
=={{header|Ruby}}==
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