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Boolean values: Difference between revisions
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=={{header|Clojure}}==
The boolean constants are ''true'' and ''false''. In a conditional context, the only false values are ''false'' and ''nil'' -- every other value is true.
=={{header|CMake}}==
<lang cmake>foreach(var 1 42 ON yes True y Princess
0 OFF no False n Princess-NOTFOUND)
if(var)
message(STATUS "${var} is true.")
else()
message(STATUS "${var} is false.")
endif()
endforeach(var)</lang>
<pre>-- 1 is true.
-- 42 is true.
-- ON is true.
-- yes is true.
-- True is true.
-- y is true.
-- Princess is true.
-- 0 is false.
-- OFF is false.
-- no is false.
-- False is false.
-- n is false.
-- Princess-NOTFOUND is false.</pre>
The strings "0", "OFF", "NO", "FALSE" and "N" (ignoring case) are false. Any string ending with "-NOTFOUND" (ignoring case) is false. All other strings are true.
Scripts that want <code>if(TRUE)</code> should require CMake 2.8; do refer to [http://www.cmake.org/cmake/help/cmake-2-8-docs.html#policy:CMP0012 cmake --help-policy CMP0012].
=={{header|Common Lisp}}==
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