Python includes exercises 12

Python 100 Li

Topic: How many prime numbers between 101-200 judgment, and outputs all the prime numbers.

Program Analysis: Analyzing primes methods: a number were removed from 2 to sqrt (this number), if divisible, indicates that this number is not a prime number, and vice versa is a prime number.

Source Code:

#!/usr/bin/python
# -*- coding: UTF-8 -*-

h = 0
leap = 1
from math import sqrt
from sys import stdout
for m in range(101,201):
    k = int(sqrt(m + 1))
    for i in range(2,k + 1):
        if m % i == 0:
            leap = 0
            break
    if leap == 1:
        print '%-4d' % m
        h += 1
        if h % 10 == 0:
            print ''
    leap = 1
print 'The total is %d' % h

The above example output is:

101 
103 
107 
109 
113 
127 
131 
137 
139 
149 

151 
157 
163 
167 
173 
179 
181 
191 
193 
197 

199 
The total is 21

Python 100 Li