变量:数字

#!/usr/bin/env python
# -*- coding: utf-8 -*-

# 整数
a = 5
b = 6

print a, b  # 5,6

a = a+1
print a  # 6

a += 2
print a  # 8

print a**2  # 64
print a  # 8

a **= 2
print a  # 64

# python中很方便的支持长整数
l = a**a
print type(l)  # <type 'long'>
# 39402006196394479212279040100143613805079739270465446667948293404245721771497210611414266254884915640806627990306816
print l

print a/b  # 10. notice!
print a % b  # 4
print divmod(a, b)  # 10 4

# 浮点数
f = 100.123
pi = 3.14
print f/pi  # 31.8863057325
print f//pi  # 31.0

# 自动向高精度靠齐
print type(a/b)  # <type 'int'>
print type(a+b)  # <type 'int'>
print type(a/f)  # <type 'float'>
print type(a+f)  # <type 'float'>