PYTHON

import timestart_time = time.time()n = int(input())
jie = 1
sum = 0
i = 1
while n >= i:jie = jie * isum = sum + jiei = i + 1
print(sum)end_time = time.time()print("程序执行时间为：", end_time - start_time, "秒")

执行结果

程序执行时间为： 0.00101470947265625 秒

JAVA

    public static void main(String[] args) {double st = System.nanoTime() / 1000000000.0;long jie = 1;long sum = 0;for (int i = 1; i <= 4000; i++) {jie = jie * i;sum = sum + jie;}System.out.println(sum);double et = System.nanoTime() / 1000000000.0;System.out.println("程序执行时间为：" + (et - st) + "秒");}

执行结果

程序执行时间为：1.868999097496271E-4秒

结论

JAVA的执行要比PYTHON快。