function Tinh_TongCacSoLe()

clc;

n = input('nhap vao so phan tu cua day so: ');

Tong = 0;

for i=1:n

    if (mod(i,2)~=0)

        Tong = Tong + i;

    end

end

fprintf ('Tong cac so le co trong day la: %d

', Tong);