Revision as of 23:12, 24 April 2010 (view source) rosettacode>Dgamey (→‎Tables) ← Older edit		Revision as of 23:13, 24 April 2010 (view source) rosettacode>Dgamey m (→‎&null) Newer edit →
Line 67: * convertible or not - convertible through explicit type conversion ==== &null ==== &null (immutable, uncoercible, unconvertable) is unique. It is a data type with only a single value, one instance only. While this may sound odd at first, &null is at the core of Icon/Unicon and contributes to the power and robustness of the language. Specifically, &null arose to overcome a short coming that any [[SNOBOL4]] programmer will be familiar with. Consider the following SNOBOL code: <lang Snobol> numb1 = 2 Line 81: write( "abc", &null) # no error as write ignores &null </lang> The power ~~of &null~~ comes from the simple null/non-null tests of which more anon. ==== integer ====

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