Решение задачи For 21

#include <bits/stdc++.h>
using namespace std;

int main() {
	srand((int)time(0));
	int N;
	N = rand() % 20 + 1;
	cout << "Number N: " << N << endl;
	
	double f = 1, s = 1;
	for(int i = 1; i <= N; i++) {
		f /= i;
		s += f;
		cout << i << " : "<< f << " : "<< s << endl;
	}
	cout << "Result: " << s << endl;
	cout << "e = " << exp(1) << endl;
	
	return 0;
}

import random
import math
N = random.randrange(1,15)
N = 20
print('N = ', N)

F = 1.0
S = 1.0
for i in range(1,N+1):
    F /= i
    S += F
    print(i," : ", F," : ", S)
print("Result:",S)
print("e = ",math.exp(1))
									

program For21;
var
  Rez,factorial:Real;
  N, i :Integer;
begin
  Write('Введите N: ');
  Readln(N);
  Rez:=1;
  factorial:=1;
  For i:=1  to N do
   begin
    factorial:=factorial*i;
    Rez:=Rez+1/factorial;
   end;
  Writeln(Rez);
end.