A.range(0,11,2)B.range(0,10,2)C.range(1,11,2)D.range(1,10,2)
A.sum(range(1,101))B.sum(range(0,101))C.sum(range(1,100))D.sum(range(0,100))
A.if num %2==0B.if num %2!=0C.if num //2==0D.if num //2!=0