我不明白 python 中的这个 max 函数

Question

I am new to programming and python. I was playing around with this max function and I don't understand why it is not returning the maximum value when actually it should

n = [11,3,9]
first_last = [n[1],n[-1]]
largest = max(first_last)
print(largest)

The result is 9 instead of 11 but why?

Answer 1

Indexing in python starts from 0. So do

list = [11,3,9]
print(max(list[0],list[-1])

Answer 2

Your Code:

n = [11,3,9] first_last = [n[1],n[-1]] largest = max(first_last) print(largest)

Indexing in python starts from 0. While negative sequence indices (-1, -2, -3,.....) helps in accessing array from the last element.

So, your n[1]=3 and n[-1]=9. This makes first_last = [3, 9]. So when you passed first_last in the max function, it gave you the maximum value among the elements of first_last which is 9.