Calculate interest earned and maturity amount for Fixed Deposit (FD) in Python

calculate-fd-interest.py

#!/usr/bin/env python3

principal = 200000

# Annual rate of interest
# e.g. 9.25%
r = 9.25

# number of compounding periods per year
# 
# monthly = 12
# quarterly = 4
# daily = 365
# half_yearly = 2
# yearly = 1
n = 4

# number of years
t = 3

# if r=9, then r_computed is 9/100
r_computed = r/100.0

maturity_amount = principal * ((1 + (r_computed/n))**(n*t))
print(maturity_amount)

print("Final maturity amount:", maturity_amount)
print("Interest earned:", maturity_amount-(principal))