Question

I am trying to write a function that will test whether or not a list is in decending order. This is what I have so far, but it doesn’t seem to be working for all lists.

I used the list [9,8,5,1,4,3,2] and it returned 'true'.

I can’t seem to figure out where my mistake is.

def ordertest(A):
    n = len(A)
    for i in range(n):
        if A[i] >= A[i+1]:
            return 'true'
        else:
            return 'false'

Answer 1

You should rather do the reverse check (As soon as you get A[i] < A[i+1], return false

def ordertest(A):
    for i in range( len(A) - 1 ):
        if A[i] < A[i+1]:
            return False
        return True