python如何换行

在这里插入代码片
my = "xiao"
you = "big"
he = my + you
print(he +'\n'+ he)

在这里插入代码片
my = "xiao"
you = "big"
he = my + you
print((he +'\n'+ he +'\n')*3)

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a = int(input())
print('{:,}\n'.format(a))