我需要编写一个从标准输入读取整数的程序，并且对于每个 integer 读取，将 pi 打印到小数位数

Question

Doing some lab questions and I came across this one, been stuck on it for ages not sure what to do from here, heres my code:

    import sys
    import math

    for number in sys.stdin:
        number = number.strip()
        pi = str(math.pi)
        print(format(pi, number))

My code is just printing pi, also i forgot to mention Im still a beginner so we haven't come across every technique.

Answer 1

you could use round instead format:

import sys
import math

for n in sys.stdin:
     number = int(n.strip())
     pi = math.pi
     print(round(pi, number))

Answer 2

Use indexing.

import sys
import math
for n in sys.stdin:
    number = int(n.strip())
    pi = str(math.pi)
    print(pi[:number+2])