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Chapter 12 Exercises

1. Fix 3 syntax errors in the code below so that it correctly prints “x is less than 3” and then “All done” when x is less than 3.

   x = 0 if x < 3 print ("x is less than 3") print ("All done)

   Add a : at the end of line 2. Indent line 3. Add a " before the ) in line 4.

   x = 0 if x < 3: print ("x is less than 3") print ("All done")

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2. The code currently prints “Hello” when the number is less than 3. Change it so that it prints “Hello” when the number is equal to 3.

   x = 3 if x < 3: print("Hello")

   Change the less than sign to ==.

   x = 3 if x == 3: print("Hello")

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3. Fix the indention in the code below to use a price of 1.45 if the weight is less than 1 and a price of 1.15 otherwise. There is also one syntax error.

   weight = 0.5 if weight < 1: price = 1.45 if weight >= 1 price = 1.15 total = weight * price print(weight) print(price) print(total)

   Change the indention on lines 3 and 5 and add a : at the end of line 4.

   weight = 0.5 if weight < 1: price = 1.45 if weight >= 1: price = 1.15 total = weight * price print(weight) print(price) print(total)

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4. Fill in line 1 with a weight that will make the total equal 1, and fix the indentation errors.

   weight = if weight >= .5: price = 2 if weight < .5: price = 1 total = weight * price print(total)

   The weight should be .5, and the indentation should look like below.

   weight = .5 if weight >= 1: price = 4 if weight < 1: price = 2 total = weight * price print(total)

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5. Fix 3 errors with indention in the code below to correctly set the price to 1.5 if the weight is less than 2 and otherwise set it to 1.3.

   weight = 0.5 numItems = 5 if weight < 2: price = 1.50 if weight >= 2: price = 1.30 total = weight * price print(weight) print(price) print(total)

   Indent lines 4 and 6. Remove the indention on line 9.

   weight = 0.5 numItems = 5 if weight < 2: price = 1.50 if weight >= 2: price = 1.30 total = weight * price print(weight) print(price) print(total)

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6. The code currently does not do anything if the number is equal to 2. Fix it so that it prints “Hey” if the number is 2.

   x = 2 if x < 2: print("Hello") if x > 2: print("Hey")

   Make the second clause <=

   x = 2 if x < 2: print("Hello") if x >= 2: print("Hey")

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7. Fix 4 errors in the code below to print “x is a number from 1 to 10” when x is greater than or equal to 1 and less than or equal to 10.

   x = 3 if x > 1 and x <= 10 print ("x is a number from 1 to 10") print ("All done")

   Change line 2 to x >= 1 and add a : at the end of the line. Indent line 3. Remove the indent on line 4.

   x = 3 if x >= 1 and x <= 10: print ("x is a number from 1 to 10") print ("All done")

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8. The following code prints “This is not 8” when the number is not 8. Change the if statement, so that it does the same thing but only uses one expression (No “and” or “or”).

   x = 8 if x < 8 or x > 8: print("This is not 8") else: print("This is 8")

   Change it to x != 8.

   x = 8 if x != 8: print("This is not 8") else: print("This is 8")

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9. Finish the conditional on line 3 to print “You can go out!” if either cleanedRoom or finishedHomework is true (not 0). It should always print “All done” as well.

   cleanedRoom = 1 finishedHomework = 0 if print ("You can go out!") print ("All done")

   Add cleanedRoom or finishedHomework: to line 3.

   cleanedRoom = 1 finishedHomework = 0 if cleanedRoom or finishedHomework: print ("You can go out!") print ("All done")

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10. Complete the conditional and fix the errors so that it prints “Good job” when the number is between 1 and 10 (inclusive) or is 15 and “Fail” when it is not.

    x = 8 if print("Good job")

    Switch the indentation levels of lines 2 and 3, and use the conditional below.

    x = 8 if (x >= 1 and x <= 10) or x == 15: print("Good job") else: print("Fail")

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11. Fix 5 errors in the following code to set the price to 1.45 if the weight is less than or equal to 1 and otherwise set it to 1.15.

    weight = 0.5 if weight < 1: price = 1.45 if weight > 1: price = 1.15 total = weight * price print(weigh) print(Price) print(total)

    Indent lines 3 and 5. Change line 2 to <=. Change line 7 to weight. Change line 8 to price.

    weight = 0.5 if weight <= 1: price = 1.45 if weight > 1: price = 1.15 total = weight * price print(weight) print(price) print(total)

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12. Fix the indentation below, so that the code sets the price based off the weight, then checks if the total is greater than the amount in your wallet.

    weight = 0.5 numItems = 5 wallet = 2 if weight < 1: price = 1.45 if weight >= 1: price = 1.15 total = numItems * price if total > wallet: print("You have no money")

    Fix the indentation so it looks like below.

    weight = 0.5 numItems = 5 wallet = 2 if weight < 1: price = 1.45 if weight >= 1: price = 1.15 total = numItems * price if total > wallet: print("You have no money")

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13. Change 3 lines in the code below to correctly set the grade so that a 90 and above is an A, 80-89 is a B, 70 - 79 is a C, 60-69 is a D and below 60 is an E.

    score = 93 if score >= 90: grade = "A" if score >= 80: grade = "B" if score >= 70: grade = "C" if score >= 60: grade = "D" if score < 60: grade = "E" print(grade)

    Change lines 4, 6, and 8 as shown below.

    score = 93 if score >= 90: grade = "A" if score >= 80 and score <= 89: grade = "B" if score >= 70 and score <= 79: grade = "C" if score >= 60 and score <= 69: grade = "D" if score < 60: grade = "E" print(grade)

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14. Fix the errors in the code, and change it, so there’s only 1 if statement. The code should print “The number is 5” when the number is 5, and should print “The number is NOT 5” when it is not.

    x = 5 if x == 5: print("The number is 5") if x != 5: print("The number is NOT 5")

    Fix the indentation and change the second if statement to an else statement.

    x = 5 if x == 5: print("The number is 5") else: print("The number is NOT 5")

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15. Fix 5 errors in the following code to set price to 1.45 if weight is less than 1 and otherwise set it to 1.15.

    weight = 0.5 if weight < 1 price = 1.45 else price = 1.15 total = weight * price print(weight) print(price print(Total)

    Add : at the end of lines 2 and 4. Indent lines 3 and 5. Add a ) at the end of line 8. Change line 9 to total.

    weight = 0.5 if weight < 1: price = 1.45 else: price = 1.15 total = weight * price print(weight) print(price) print(total)

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16. Complete and finish the code on lines 1 and 4 so that the code prints “Hi”.

    x = if not x != 3: print("Hi") print("Hello")

    Line 1 should be x = 3, and line 4 should be else.

    x = 3 if not x != 3: print("Hi") else: print("Hello")

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17. Write a procedure that will print out “even” if the passed value is even and “odd” if the passed value is odd. Test both possibilities.

    Define the procedure as shown below and be sure to test it.

    def printIfEvenOrOdd(x): if x % 2 == 0: print("x is even") else: print("x is odd") printIfEvenOrOdd(92) printIfEvenOrOdd(5)

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18. Write a procedure that takes 2 ints, total price, and amount in wallet. Print “You have enough money” if the difference between the wallet and price is 0 or greater; otherwise, print “Get more money”

    Do as shown below.

    def aProcedure(price, wallet): if (wallet - price) >= 0: print("You have enough money") else: print("Get more money") aProcedure(10, 20)

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19. Write a function that takes a number for a grade and returns a string grade. It should return E for any value below 60, D for 61 to 69, C for 70 to 79, B for 80 to 89 and A for 90 and above. Write code to test each grade range.

    Create a function as shown below. Call it to test it and print the result.

    def getGrade(x): if x >= 90: return "A" if x >= 80 and x < 90: return "B" if x >= 70 and x < 80: return "C" if x >= 60 and x < 70: return "D" if x < 60: return "E" print(getGrade(95)) print(getGrade(90)) print(getGrade(85)) print(getGrade(80)) print(getGrade(75)) print(getGrade(70)) print(getGrade(65)) print(getGrade(60)) print(getGrade(55)) print(getGrade(50)) print(getGrade(0))

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20. Write code that prints “Fizz” when the number is divisible by 3, “Buzz” when it is divisible by 5, and “FizzBuzz” when it is divisible by 3 and 5 (If a number is divisible by 3 and 5, it should also print “Fizz” and “Buzz”).

    x = 3 if x % 3 == 0: print("Fizz") if x % 5 == 0: print("Buzz") if x % 3 == 0 and x % 5 == 0: print("FizzBuzz")

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