How to find second largest number in a list?

Question

So I have to find the second largest number from list. I am doing it through simple loops.

My approach is to divide a list into two parts and then find the largest n

Answer 1

 list1=[1,10,2,3,5,7,1,-32,90,99,99]
 max=0
 secmax=0
 for i in list1:
    if i>max:
       max=i
 for i in list1:
    if i>secmax and max!=i:
      secmax=i
 print(secmax)