getfirst

Purpose

Get the first element of a range set or a list.

Synopsis

function getfirst(r:range):integer

function getfirst(l:list):type_of_l

Arguments

r	A range set
l	A list

Return value

The first element of the set or list.

Example

In this example the range set r is defined before its first and last elements are retrieved and displayed:

declarations
 r=2..8
end-declarations
  ...
writeln("First element of r: ", getfirst(r),
        "\nLast element of r: ", getlast(r))

Further information

When applied to a list, the type of the function is the type of the list. An error is generated if the argument of the function is empty.