For {#blank#}1{#/blank#} to 9

    For b=0 to 9

        For c=0 to 9

            For d=0 to 9

                X={#blank#}2{#/blank#}

                If {#blank#}3{#/blank#} then

                    print x

                End if

            Next d

        Next c

    Next b

Next a

s=0

for i in range(1，21) ：

  s=

print (s)

n=0

for i in range(1,4):

  n+=i

程序如下：

i = 5

sum = 0

while i <= 10:

    sum = sum + i

    i = i + 1

print(sum)

程序输出值是：{#blank#}1{#/blank#}。