def isSorted(lst):
    """
    Return True if the list is in ascending order.
    """
    for i in range(len(lst)-1):
        if lst[i] > lst[i+1]:
            return False

    return True

print isSorted([1, 2, 5, 7, 100, 10000])
print isSorted([10000, 100, 7, 5, 2, 1])
print isSorted([1, 5, 2, 7, 100, 10000])