
    In a personalized learning system where student improvement areas are tracked using negative scores (with values closer to 0 indicating better performance), write a function to identify the highest performance score from a collection of student assessment results. The score must be negative, and if no negative scores exist, the function should handle this case appropriately.
    

    
def largest_neg(list1):
    """
    In a personalized learning system where student improvement areas are tracked using negative scores (with values closer to 0 indicating better performance), write a function to identify the highest performance score from a collection of student assessment results. The score must be negative, and if no negative scores exist, the function should handle this case appropriately.
    

    """
def largest_neg(list1):
    """
    In a personalized learning system where student improvement areas are tracked using negative scores (with values closer to 0 indicating better performance), write a function to identify the highest performance score from a collection of student assessment results. The score must be negative, and if no negative scores exist, the function should handle this case appropriately.
    

    """
    max = list1[0]
    for x in list1:
        if x < max:
            max = x
    return max