FIRST _ _ _ _ _ _ _ _ _ _ _ _ operator
The first operator returns the first element of a list.
first(<list>) or first <list>
<list> must be a non-empty list to avoid an error message.
alist := {a,b,c,d}; ALIST := {A,B,C,D} first alist; A blist := {x,y,{ww,aa,qq},z}; BLIST := {X,Y,{WW,AA,QQ},Z} first third blist; WW