# ex 程序代码

#EXp301

s = ['I', 'love', 'Python']

for i in range(len(s)):

   print(s[i], end = ' ')

#EXp302

print("------------------------------------------- ")

courses = ['Maths', 'English', 'Python']

scores = [88, 92, 95]

for c, s in zip(courses, scores):

   print('{0} :  {1:d}'.format(c, s))

#EXP303    编程计算1+2!+3!+…+50!的和

print("------------------------------------------- ")

s=0

k=50     #计算1+2!+3!+…+k!的和

for i in range(1, k+1):

    product = 1

    for j in range(2, i+1):

       product *= j

    s += product

print("1+2!+...+",k,"!= ",s)

#p64  EX303  方法2

print("------------------------------------------- ")

item, s = 1, 0

k=50

for i in range(1, k+1):

    item *= i

    s += item

print("1+2!+...+",k,"!= ",s)

#p64  EX304

print("------------------------------------------- ")

#输出2~100之间的素数，每行显示5个

from math import sqrt

j = 2 ; count = 0

while j <=100:

   i = 2

   k= sqrt(j)

   while i <= k:

      if j%i == 0: break

      i += 1

      if i > k:

          count += 1

          if count % 5 == 0:

               print(j, end = '\n')

          else:

               print(j, end = ' ')

   j += 1