
#打印5行五列星星
# j = 0
# while j < 5:
# i = 0 //一行星星开始
# while i < 5:
# print('*',end='')
# i += 1 //一行星星结束
# print() //换行
# j += 1
# 打印直角三角形
# j = 0 //行号
# while j < 5:
# i = 0
# while i <= j: //每行星星个数等于行号
# print('*',end='')
# i += 1
# print()
# j += 1
# 打印倒直角三角形
# j = 0
# while j < 5:
# i = 5
# while i > j:
# print('*',end='')
# i -= 1
# print()
# j += 1
#九九乘法表
# j = 1
# while j <= 9:
# i = 1
# while i <= j:
# print(f'{i} * {j} = {i*j}',end='\t')
# i += 1
# print()
# j += 1
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