计算复合收益和复合收益率

import math
 
# 方法1，最原始的计算方法，代码多，逻辑最清晰
capital = 2
rate = 0.2
for i in range(0, 5):
capital *= 1 + rate
print(str(capital))
# result = 4.97664
 
 
# 方法2， 利用平方运算符 **
capital = 2
rate = 0.2
capital *= ((1+rate)**5)
print(str(capital))
# result = 4.976639999999999
 
 
# 方法3，利用 math.pow 函数来计算
capital = 2
rate = 0.2
capital *= math.pow(1+rate, 5)
print(str(capital))
# result = 4.976639999999999

import math
 
begin = 2
end = 4.97664
a = 5
 
# 方法1
rate = (end/begin)**(1.0/a)-1
print(str(rate))
# result = 0.19999999999999996
 
# 方法2
rate = math.pow(end/begin, 1.0/a)-1
print(str(rate))
# result = 0.19999999999999996