largest number code to including negative numbers : I was working is on this code to find the largest number from numbers entered by a user. What do I need to add to include largest negative numbers? say if a user enters -3 and -1, to get the outcome of -1. Thank you.

    m = 0
    finished = False
    while not finished:
        print('Enter a number (0 to finish): ', end = '')
        s = input()
        num = int(s)
        if num != 0:
            if num > m:
                m = num
        else:
            finished = True
    print(str(m))