10. Exercise

• We want to develop a program that determines the future value of an investment, given the initial value and the interest rate

• We follow the steps for development.

• Analysis:

  • The initial money generates an annual interest rate

  • How much will it be worth in 10 years?

  • Input: initial amount, interest rate

  • Output: value in 10 years

• Specification:

  • The user enters the initial amount invested

  • The user enters the annual interest rate

  • Value of the financial mathematical formula * (1 + interest)

• Design:

  • Enter the initial investment amount.

  • Enter the interest rate.

  • Repeat 10 times:

    • initial value = initial value * (1 + interest rate)

  • Print the updated value.

• Implementation:

  • Test values:

    • 1000 dollars investment and 3% annual interest rate

    • 1000 dollars investment and 10% annual interest rate

Save & RunResetLoad History

6

 

1

value = float(input("Initial amount invested: "))

2

rate = float(input("Annual interest rate: "))

3

for i in range(10):

4

    value = value * (1 + rate / 100)

5

print("Value after 10 years:  %5.2f" % value)

6

​

Activity: 10.1 ActiveCode (ac_l40_10_en)

10.1. FAQs

Q-2: Why is defining some tests before implementation a good programming practice?

A. Not necessary for good programming.
B. Helps us build the correct product without waste or redundancy
C. Makes the code run faster.
D. Allows the programmer to write less code.
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Activity: 10.1.1 Multiple Choice (feedback_l40_10_1_en)

Q-3: What is the advantage of writing pseudocode in the design stage?

A. Saves time and effort in later coding.
B. Helps identify syntax errors in the code.
C. Allows testing of the program's logical flow before coding it.
D. Facilitates code debugging.
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Activity: 10.1.2 Multiple Choice (feedback_l40_10_2_en)

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