while语句：

count = 0while True:    print(count)    count += 1    if count == 10:        break

实例：

计算n！，若：n = 5；则：n! = 5 * 4 * 3 * 2 * 1

#n!n = int(input("输入n："))number = nwhile True:    if number == 1:        break    number = number * (n-1)    n -= 1    if n <= 2:        breakprint(number)