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anInt = 5
aFloat = 5.0
aLong = 555555555555555555555555555555555L
aComplex = 1.23+4.56J

print "Int:", anInt
print "Float:", aFloat
print "Long:", aLong
print "Complex", aComplex


    

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# 更新
anInt += 1
print anInt

anInt = anInt + 1
anInt


    

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5 == 5


    

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4.9 >= 5


    

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1 < 3 < 5 # 等同于 (1 < 3) and (3 < 5)


    

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1 < 5.0 == 5 # 等同于 (1 < 5.0) and (5.0 == 5)


    

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# 支持算术操作符
print +5, -5
print 5 + 1, 5 - 1, 2 * 4, 9 % 3, 2**2


    

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# 传统除法
print 5 / 2
print 5.0 / 2 # 等同于 5 / 2.0


    

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# 正确的除法
from __future__ import division
print 5 / 2


    

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2 ** 4


    

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-2 ** 4


    

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(-2) ** 4


    

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1 + 2 * 3


    

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(1 + 2) * 3


    

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print anInt
float(anInt)


    

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print aFloat
int(aFloat)


    

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str(anInt)


    

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# 绝对值
myInt = -5
print abs(myInt)
myInt = -5.0
print abs(myInt)
myInt = 5
print abs(myInt)


    

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x, y = 9, 3
print divmod(x, y)
print x // y, x % y


    

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print pow(2, 4)
2 ** 4


    

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myFloat = 3.14159265359
print myFloat
round(myFloat, 3)


    

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import math


    

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math.pow(2, 3)


    

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math.sqrt(9)


    

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# --------------------------------------------------------------------------------  
# Copyright (c) 2013 Mack Stone. All rights reserved.  
#   
# Permission is hereby granted, free of charge, to any person obtaining a copy  
# of this software and associated documentation files (the "Software"), to deal  
# in the Software without restriction, including without limitation the rights  
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell  
# copies of the Software, and to permit persons to whom the Software is  
# furnished to do so, subject to the following conditions:  
#   
# The above copyright notice and this permission notice shall be included in  
# all copies or substantial portions of the Software.  
#   
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR  
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,  
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE  
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER  
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,  
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN  
# THE SOFTWARE.  
# --------------------------------------------------------------------------------