# compound_interest.py

print("Compound Interest calculator.  FV = P(1+r/n)^nt")

P = eval(input("Enter the principal, P: "))
r = eval(input("Enter the interest rate, r%: "))
r = r / 100
t = eval(input("Enter the time, t, in years: "))
n = eval(input("Enter the number of compoundings, n, per year: "))

print("Period\tInt.\tBalance")

for period in range(1,n*t+1):
    I = P * r/n
    P = P + I
    print(f"{period:}\t{I:.2f}\t{P:.2f}")

print()
print(f"Future value: ${P:.2f}")