Standard Deviation and Variance

def avg(n) :
    sum_elem = 0

    for i in n :
        sum_elem += i

    return sum_elem//len(n)

def main() :
    T_num = ()
    sum_mdev = 0

    n = int(input("Enter the Number of  Elements : "))

    for i in range(n) :
        num = int(input("Enter the Number : "))
        T_num += (num,)

    avg_num = avg(T_num)

    for j in range(n) :
        temp = T_num[j] - avg_num
        sum_mdev += (temp**2)

    print("\nThe Variance of  the elements entered : " , (1/n)*sum_mdev)
    print("The Standard Deviation of the elements entered : " , ((1/n)*sum_mdev)**0.5)

main()