1. Tashkiliy operator va uning

else
begin
y:a*sin(a);
z:Sqr(y)*y;
`:tan(yz);
writeln(z)
end;

Ko`pgina operatorlar kabi, shartli operator ham rekursivlik xossasiga ega yahni, shartli operator ichida yana shartli operator qatnashishi mumkin. Lekin, chala shartli operatorning ichida yana shartli operator yozishda ehtiyot bo`lmoq zarur, chunki yozilgan operatorni ikki xil ma`noda tushunish mumkin:

if B1 then if B2 then S1 else S2

bu operator quyidagicha tushunilishi mumkin:

1) if B1 then begin if B2 then S1 else S2 end

2. 
   if B1 then begin if B2 then S1 end else S2