num=20 lst1=[i for i in range (num) if i%2] #單數數列, odd num. print(lst1) lst2=[i for i in range (num) if not i%2] #雙數數列, even num. print(lst2) lst3=[i+j for i in range (num) if i%2 for j in range (num) if not (j%2)] print(lst3)