tvm2.py

Created on February 08, 2022
1.2 KB
TVM Solver with balance
from math import *
def tvm():
  print("Select variable to solve:")
  print("1:PMT 2:FV 3:PV 4:N 5:bal")
  solv=int(input("?"))
  
  if (solv != 4) and (solv !=5):
    N=int(input("  N= "))
    
  r=float(input(" I%= "))
  
  if solv != 3:
    pv=float(input(" PV= "))
  
  if solv != 1:
    pmt=float(input("PMT= "))
  
  if (solv != 2) and (solv !=5):
    fv=float(input(" FV= "))
  
  ppy=int(input("P/Y= "))
  
  if solv == 5:
    m=int(input("pmt# = "))
  
  if r > 1:
    r=r/100
    
  if solv == 1:
    pmt=-r/ppy*(fv+pv*(1+r/ppy)**N)/((1+r/ppy)**N-1)
    print("")
    print("Periodic Payment:")
    print("pmt=",pmt)
    
  if solv == 2:
    fv=(ppy*pmt-ppy*pmt*(1+r/ppy)**N-pv*r*(1+r/ppy)**N)/r
    print("")
    print("Future Value:")
    print("FV=",fv)
    
  if solv == 3:
    pv=((1+r/ppy)**(-N)*(ppy*pmt-fv*r-ppy*pmt*(1+r/ppy)**N)/r)
    print("")
    print("Present Value:")
    print("PV=",pv)
    
  if solv == 4:
      N=log((ppy*pmt-fv*r)/(ppy*pmt+pv*r))/log(1+r/ppy)
      print("")
      print("Number of Payments:")
      print("N=",N)
      
  if solv == 5:
    bal=pv*(1+r/ppy)**m + pmt*((1+r/ppy)**m-1)/(r/ppy)
    print("")
    print("Balance after",m,"payments:")
    print("bal=",bal)