the first element of a range set or a list.
The first element of the set or list.
In this example the range set r is defined before its first and last elements are retrieved and displayed:
writeln("First element of r: ", getfirst(r),
"\nLast element of r: ", getlast(r))
When applied to a list, the type of the function is the type of the
An error is generated if the argument of the function is empty.
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