質問編集履歴
2
追記
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File without changes
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body
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@@ -22,7 +22,6 @@
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22
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month, startingなどはprintするごとに変化します。
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23
23
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24
24
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```
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25
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-
# Programming Exercise 3.10
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26
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# Compute a payment schedule
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27
26
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28
27
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DISCOUNT_RATE = 0.1
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@@ -70,7 +69,7 @@
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70
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f"{month:5d} {starting:16.2f} {interest:15.2f} {principal:16.2f} {monthly_payment:7.2f} {remaining:14.2f}"
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71
70
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)
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72
71
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73
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-
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72
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+
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74
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# Evaluate the remaining and display the info of the last month
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75
74
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if monthly_payment >= remaining:
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76
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month += 1
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1
追記
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@@ -1,3 +1,4 @@
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1
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+
# f-stringの変数化
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1
2
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下記のようにf-stringを用いて複数の変数を表示するのですが、同じコードを条件分岐などで複数回使います。
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2
3
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3
4
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```
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@@ -14,4 +15,72 @@
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14
15
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# print(f"{formatted_output}")
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15
16
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```
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16
17
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17
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-
f-stringのコードを変数として定義することはできないのでしょうか?
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18
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+
f-stringのコードを変数として定義することはできないのでしょうか?
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19
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+
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20
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+
# 追記
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21
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+
プログラムは、リボ払いでの各月の金利や支払額を表のように出力するものです。
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22
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+
month, startingなどはprintするごとに変化します。
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23
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+
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24
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+
```
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25
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+
# Programming Exercise 3.10
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26
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+
# Compute a payment schedule
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27
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+
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28
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+
DISCOUNT_RATE = 0.1
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29
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+
ANNUAL_INTEREST_RATE = 0.12
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30
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+
MONTHLY_INTEREST_RATE = ANNUAL_INTEREST_RATE / 12
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31
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+
MONTHLY_PAYMENT_RATE = 0.05
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32
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+
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33
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+
original_price = float(input("Enter the purchase price: "))
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34
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+
discounted_price = original_price * (1 - DISCOUNT_RATE) # The price for members
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35
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+
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36
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+
month = 1
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37
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+
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38
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+
starting = discounted_price # The current total balance owed
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39
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+
monthly_payment = (
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40
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+
discounted_price * MONTHLY_PAYMENT_RATE
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41
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+
) # the sum of interest and principal for that manth
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42
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+
interest = discounted_price * MONTHLY_INTEREST_RATE
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43
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+
principal = monthly_payment - interest
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44
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+
remaining = starting - principal # The balance remaining after payment
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45
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+
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46
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+
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47
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+
# display the titles of a table
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48
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print(
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49
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+
"\n"
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50
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+
"Month Starting Balance Interest to Pay Principal to Pay Payment Ending Balance\n"
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51
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+
"-----------------------------------------------------------------------------------"
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52
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)
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53
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+
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54
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+
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55
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+
# Display the info of the first month
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56
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+
print(
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57
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+
f"{month:5d} {starting:16.2f} {interest:15.2f} {principal:16.2f} {monthly_payment:7.2f} {remaining:14.2f}"
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58
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+
)
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59
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+
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60
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+
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61
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+
# Display the info of the second month and later
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62
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+
while monthly_payment <= remaining:
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63
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+
month += 1
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64
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+
starting = remaining
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65
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+
interest = starting * MONTHLY_INTEREST_RATE
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66
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+
principal = monthly_payment - interest
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67
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+
remaining = starting - principal
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68
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+
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69
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+
print(
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70
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+
f"{month:5d} {starting:16.2f} {interest:15.2f} {principal:16.2f} {monthly_payment:7.2f} {remaining:14.2f}"
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71
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+
)
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72
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+
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73
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+
s = "{month:5d} {starting:16.2f} {interest:15.2f} {principal:16.2f} {monthly_payment:7.2f} {remaining:14.2f}"
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74
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+
# Evaluate the remaining and display the info of the last month
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75
|
+
if monthly_payment >= remaining:
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76
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+
month += 1
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77
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+
starting = remaining
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78
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+
interest = 0
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79
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+
principal = starting
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80
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+
monthly_payment = starting
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81
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+
remaining = 0
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82
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+
|
|
83
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+
print(
|
|
84
|
+
f"{month:5d} {starting:16.2f} {interest:15.2f} {principal:16.2f} {monthly_payment:7.2f} {remaining:14.2f}"
|
|
85
|
+
)
|
|
86
|
+
```
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