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Boolean values: Difference between revisions
Added Neko
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Newer implementations of the language may also support !! (exclusve or).
There is one unary boolean operator: ' (not).</p>
=={{header|Neko}}==
Neko includes a bool boolean data type, true and false. Conditional execution flow only reacts to bool, numeric values test as false as are string literals.
Neko also includes two low level builtins: $not(value) and $istrue(value). These return bool results. $not returning true if value
is false, 0 or null. $istrue returning true if value is not false, not 0 and not null.
<lang neko>/* boolean values */
$print(true, "\n");
$print(false, "\n");
if 0 {
$print("literal 0 tests true\n");
} else {
$print("literal 0 tests false\n");
}
if 1 {
$print("literal 1 tests true\n");
} else {
$print("literal 1 tests false\n");
}
if $istrue(0) {
$print("$istrue(0) tests true\n");
} else {
$print("$istrue(0) tests false\n");
}
if $istrue(1) {
$print("$istrue(1) tests true\n");
} else {
$print("$istrue(1) tests false\n");
}</lang>
{{out}}
<pre>
prompt$ nekoc boolean.neko
prompt$ neko boolean
true
false
literal 0 tests false
literal 1 tests false
$istrue(0) tests false
$istrue(1) tests true</pre>
=={{header|Nemerle}}==
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