from typing import List


def less_than(list_: List[float], n: int) -> float:
    """
    Get number of symbols in `list_` which have a value less than `n`.

    Parameters
    ----------
    list_ : List[float]
    n : int

    Returns
    -------
    float :
        Number of elements of the list_ which are strictly less than n.
    """
    return float(len([1 for el in list_ if el < n]))