Null object: Difference between revisions

=={{header|Langur}}==

Null can be compared for directly, using equality operators, or can be checked with the isNull() function. Database operators (ending with ? mark) propagate null. A null in an expression test is a non-truthy result.

<lang Langur>var (.x, .y) = (true, null)

writeln .x == null

writeln .y == null

writeln .x ==? null

writeln .y ==? null

# null not a "truthy" result

writeln if(null: 0; 1)</lang>

{{out}}

<pre>false

true

null

null

1</pre>