ln Natural Log in Python

Question

In this assignment I have completed all the problems except this one  I have to create a python script to solve an equation  screenshot    Unfortunately  in my research all over the internet I cannot figure out how in the world to either convert ln to log or anything usable  or anything  The code I have written so far is below  I will also post the answer that our teacher says we should get  import math p   100 r   0 06   12 FV   4000  n   str ln     1    FV   r    p     ln    1   r      print   quot Number of periods    quot    str n    The answer I should get is 36 55539635919235 Any advice or help you have would be greatly appreciated  Also  we are not using numpy  I already attempted that one  Thanks

User · Answer

Here is the correct implementation using numpy (np.log() is the natural logarithm)

import numpy as np
p = 100
r = 0.06 / 12
FV = 4000

n = np.log(1 + FV * r/ p) / np.log(1 + r)

print ("Number of periods = " + str(n))

Output:

Number of periods = 36.55539635919235

User · Answer

math log is the natural logarithm   From the documentation      math log x   base   With one argument  return the natural logarithm of   x  to base e     Your equation is therefore   n   math log  1    FV   r    p    math log 1   r      Note that in your code you convert n to a str twice which is unnecessary

[python] ln (Natural Log) in Python

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