变量和表达式 





1 principal = 1000        #本金
2 rate = 0.05             #利率
3 numyears = 5            #期数
4 year = 1                #初始化值
5 while year <= numyears:
6     principal = principal*(1+rate)
7     print year, principal
8     year += 1




输出结果为：


1 1050.0
2 1102.5
3 1157.625
4 1215.50625
5 1276.2815625


 






            

            
posted @ 
2015-01-14 19:52 
loveyuu 
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