Matlab calculates the factorial sum of the first n numbers (easy to understand)

Problem description ： Enter a positive integer N, seek 1! + 2！+3！+ ...+ N！ And .

function [ s ] = T5( N )// The file name is T5.m
m=1;s=0;
for i=1:N
    m=m*i;
    s=s+m;
end
end