打印金字塔练习

PriscillaChan

ch=1
print("let's print a pyramid!")
while ch:
    n=int(input('your pyramid layer: '))
    for i in range(1,n+1):
        print(' '*(n-i),'*'*(2*i-1))
    ch=int(input('wanna again? 1 or 0 '))
    if not ch:
        print('bye bye')
    else:
        print("let's print again!")


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