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

n=100
while n > 0:
        n-=1
        if n % 2 == 0:
                continue
        print (n)
　　　　# n-=1 不可以放在这里，一旦遇到continue，while就进入下一次循环而i值却未递增

[zheng@localhost python]$ cat day01_number_01.py
#!/usr/bin/python
# -*- coding: UTF-8 -*-

import math
‘‘‘
    改变Number数据类型，将重新分配存储空间
‘‘‘

print "abs(-18):",abs(-18)
print "math.ceil(-4.1):",math.ceil(-4.1)
# cmp only used in python 2.x
print "cmp(80,100):",cmp(80,100)
print "math.exp(100.12):",math.exp(100.12)

print "math.fabs(-5):",math.fabs(-5)
print "math.floor(-5.1):",math.floor(-5.1)
print "math.log(e):",math.log(math.e)
print "math.log(100,10):",math.log(100,10)
print "math.log10(100):",math.log10(100)

print "max(1,2,6,3.5,8):",max(1,2,6,3.5,8)

print "math.modf(100.72):",math.modf(100.72)

print "math.pow(100,2):",math.pow(100,2)