打印小星星
row = 1
while row <= 5:
col = 1
while col <= row:
#print("%d" % col)
print("*", end="")
col += 1
#print("第%d行" % row)
print('')
row += 1
打印九九乘法表
row = 1
while row <= 9:
col = 1
while col <= row:
print("%d * %d = %d" % (col, row, col*row), end=" ")
col += 1
print()
row += 1