The nil
value defined in the Metview Macro language can be used in the ways described below - an example of the use of nil
for initialisation of lists can be found in Lists.
any (nil
&
any)
any (any
&
nil)
The value nil can be concatenated to any other value. The result is the original value.
number (nil
=
any)
number (any
=
nil)
number (nil
<>
any)
number (any
<>
nil)
Any value can be compared with nil . Only nil is equal to nil . Returns a number, either 0 (false) or 1 (true).
number
count
(nil)
Returns 0.