Write a function score_grade(score), The function takes an argument score, Represents the entered score , The function is used to convert a 100 point score into a grade score ： If the score entered is in 90 More than （ contain 90 branch ） Output A; 80 branch -90 branch （ Not included 90 branch ） Output B; 70 branch -80 branch （ Not included 80 branch ） Output C; 60 branch -70 branch （ Not included 70 branch ） Output D; 60 The output is as follows E. Call function , Set the parameters as 95,82,55,63 View output .
Write a function prime_num(rg), The function takes an argument rg, The function is to 0~rg Find the primes in the range , And count the total number of primes .
Demonstrate saving the above two functions as modules , And make an authentication call .
