Python打印三角形

1.左上三角

rows = 5   # 行数
for i in range(0, rows):
    for k in range(0, rows - i):
        print(' * ', end=' ')
        k += 1
    i += 1
    print('\t')

2.右上三角

rows = 5
for i in range(rows):
    for j in range(0