def search(hvalue, periods, rate,
desiredpay): # Define a new Bisection search function
# Start with an interval that we know contains a solution
a = 0 # Set one side of the interval as a = 0
b = hvalue # Set the other side of the interval as b = hvalue
# "hvalue equals to the home price, which is upper bound of down payment"
while True: # Start the loop
import mortgage # Import the mortgage module
c = (a + b) / 2 # Bisect the interval
dpayment = c # Define dpayment (down payment)
loan = hvalue - dpayment # Define loan
Fc = mortgage.mortgage_payment(loan, periods, rate) - desiredpay
# Calculate F(c) to determine which side of the origin interval contains the solution
if abs(Fc) < 0.000001:
return dpayment # If F(c) is infinately close to zero, the search is finished
# Return c, which is also the down payment, as the result of the function
elif Fc < 0: # If F(c) is below 0, then the solution is in the left side of the interval
b = c # Replace b with c and continue
else: # If F(c) is above 0, then the solution is in the right side of the interval
a = c # Replace a with c and continue
import math, mortgage
home = float(input('Home price: '))
mindown = int(input('Minimum down payment: '))
maxdown = int(input('Maximum down payment: '))
interest = float(input('Interest rate: '))
term = float(input('Loan term (years): '))
periods = term * 12
rate = interest / 100 / 12
for down in range(mindown, maxdown, 1000):
loan = home - float(down)
monthly = mortgage.mortgage_payment(loan, periods, rate)
print(str(down) + " " + str(round(monthly, 2)))
#Creating input functions
home_value = float(input("Home Value: "))
min_down_payment = int(input("Minimum Downpayment: "))
max_down_payment = int(input("Maximum Downpayment: "))
term = float(input("Term in years: "))
interest_rate = float(input("Interest Rate: "))
#Calculating loan amount
for down_payment in range(min_down_payment, max_down_payment, 1000):
def loan(home_value, down_payment):
return(home_value - down_payment)
l = float(loan(home_value, down_payment))
#Calculating monthly periods
def monthly_period(term):
return(term*12)
p = float(monthly_period(term))
#Calculating monthly interest rate
def monthly_rate(interest_rate):
return((interest_rate/100)/12)
r = float(monthly_rate(interest_rate))
#Calculating morgtage values
m = mortgage.mortgage_payment(l, p, r)
m = round(m, 2)
print (down_payment, m)
#end
return(term*12)
p = float(monthly_period(term))
#Calculating monthly interest rate
def monthly_rate(interest_rate):
return((interest_rate/100)/12)
r = float(monthly_rate(interest_rate))
#Setting the range for down_payment
min_down_payment = 0
max_down_payment = home_value
#Running a bisection function to find the value of the Downpayment
while True:
d = (min_down_payment + max_down_payment)/2
Fl = mortgage.mortgage_payment(home_value - d, p, r)
if abs(Fl - d_monthly_payment) < 1:
break
elif Fl < d_monthly_payment:
#print("max is reduced")
max_down_payment = d
else:
#print("min is increased")
min_down_payment = d
print("Downpayment: ", round(d, 2))
#end
#Importing all modules
import mortgage
#Creating input functions
home_value = float(input("Home Value: "))
down_payment = float(input("Downpayment: "))
term = float(input("Term in years: "))
interest_rate = float(input("Interest Rate: "))
#Calculating loan amount
def loan(home_value, down_payment):
return(home_value - down_payment)
l = float(loan(home_value, down_payment))
#Calculating monthly periods
def monthly_period(term):
return(term*12)
p = float(monthly_period(term))
#Calculating monthly interest rate
def monthly_rate(interest_rate):
return((interest_rate/100)/12)
r = float(monthly_rate(interest_rate))
#Calculating mortgage payment
m = float(mortgage.mortgage_payment(l, p, r))
final_mortgage_payment = round(m, 2)
print("Monthly payment: ", final_mortgage_payment)
#end
import math, mortgage
home = float(input('Home price: '))
interest = float(input('Interest rate: '))
term = float(input('Loan term (years): '))
monthlygoal = float(input('Desired monthly payment: '))
loanhi = home
loanlo = 0
periods = term * 12
rate = interest / 100 / 12
while True:
loan = (loanlo + loanhi) / 2
floan = mortgage.mortgage_payment(loan, periods, rate) - monthlygoal
if abs(floan) < 0.01:
break
elif floan < 0:
loanlo = loan
else:
loanhi = loan
down = home - loan
print("\nDown payment: " + str(round(down, 2)))