嵌套循环练习

嵌套循环练习 嵌套循环练习 打印矩形

i = 0
while i < 5:
    print('*' * 5,end='n')
    i += 1

python 里可以用一个循环打印三角形

i =0
while i < 5:
    i += 1
    print(i * '*')

嵌套循环打印矩形

#嵌套打印矩形
#总结外循环控制行数，内循环控制列数
# print('*',end=' ')
# print('*',end=' ')
# print('*',end=' ')
# print('*',end=' ')
# print('*',end='')
# print() 

k = 0
while k < 5:
    k += 1
    j =0
    while j < 5:
        j += 1
        print('*',end=' ')
    print()

嵌套循环打印三角形

k = 0
while k < 5:
    k += 1
    j =0
    while j < k:
        j += 1
        print('*',end=' ')
    print()

打印九九乘法表

j = 0
while j < 9:
    j +=1
    i = 0
    while i < j:
        i += 1
        print(i,'*',j,'=',(i*j),sep='',end='t')
    print()