Positional & keyword Arguments

Positional argument:

cuz we didn't specify anywhere which particular parameter we want to associate these datas with

在解决实际问题的时候，用round（）不能解决

像1.2，实际上我们需要2而不是1

python - How do you round UP a number? - Stack Overflowhttps://*.com/questions/2356501/how-do-you-round-up-a-number解决问题的方法如上

import math
print(int(math.ceil(4.2)))

奇数：Prime number