嵌套语句使用

星号打印

for i in range(1,6):
    for x in range(1,i+1):
        print('*',end='')
    print('')
for i in range(1,6):
    for x in range(i,6):
        print('*',end='')
    print('')

99乘法表  while循环

n =1
while n<=9:
    x=1
    while x<=n:
        print(f"{x}*{n}={n*x}",end='\t')
        x+=1
    n+=1
    print('')

99乘法表  for循环

for i in range(1,10):
    for x in range(1,i+1):
        print(f"{x}*{i}={x*i}",end='\t')
    print("")