if...else

if…else chooses between two tests, based on some true/false conditional value. For example, given the following case fragment:

                13 Feb 03   03 Oct 03   16 Nov 03	20 Dec 03
ABC                2.5        3.2         2.9        2.7
GHF                3.4        3.6         3.3        3.1
Sex                                                  F

max (GHF if Sex is “F” else ABC) > 3.5