《python语言程序设计》第5章 第23题 贷款计算

LOAN_AMOUNT = 10000
number_years = 5
NUMBER_OF_YEAR = number_years * 12
interest_rate = 5
month_rate = interest_rate / 1200

print(f"""
   Loan amount: {LOAN_AMOUNT}
   number of years: {number_years}

\t Interest Rate   Monthly Payment   Total Payment
""")
while interest_rate <= 8:
    month_rate = interest_rate / 1200
    monthly_rate = (LOAN_AMOUNT * month_rate) / (1 - (1 / (1 + month_rate) ** 60))
    year_rate = monthly_rate * 12 * number_years
    print("\t  ", format(interest_rate, ".3f"), "%", "        ", format(monthly_rate, ".2f"),
          "        ", round(year_rate, 2))

    interest_rate += 0.125