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Section 4.14 Write Code Questions

Activity 4.14.1.

Fix the errors in the code, and change it to use only one if statement. The code should print β€œThe number is 5” when the number is 5, and should print β€œThe number is NOT 5” when it is not.
Solution.
β€œThe number is 5β€β€œThe number is NOT 5”
# Initialize x and set condition for when x = 5
x = 5
if x == 5:
    # Indent the body of if statement
    print("The number is 5")
# Use else for the secondary condition
else:
    # Indent the body of else statement
    print("The number is NOT 5")

Activity 4.14.2.

Complete the conditional below so the word β€œHi” is printed if x does not equal 3 and β€œHello” is printed otherwise.

Activity 4.14.3.

Complete the pay computation to give the employee 1.5 times the hourly rate for hours worked above 40 hours, if the regular pay rate is $10 an hour. Then set grossPay equal to the amount an employee would be paid for working 45 hours.
Solution.
# Initializing variables
hours = 45
rate = 10
# overtimeRate is 1.5 the rate amount
overtimeRate = rate * 1.5
grossPay = 0
# Begin conditional to see if hours are within regular pay
if hours <= 40:
    #if within 40 hours, pay will be hours * rate
    grossPay = hours * rate
# Else statement for when hours are greater than 40
else:
    # Create variable for overtime hours
    overTime = hours % 40
    # Pay will equal the regular rate for 40 hours,
    # plus the overtime rate for the extra hours
    grossPay = (rate * 40) + (overTime * overtimeRate)
# Print the final pay
print(grossPay)

Activity 4.14.4.

Rewrite your pay program using try and except so that your program handles non-numeric input gracefully by printing a message and exiting the program. The following shows two executions of the program:
Enter Hours: 20
Enter Rate: nine
Error, please enter numeric input
Enter Hours: forty
Error, please enter numeric input

Activity 4.14.5.

Write the code to calculate and print the cost of a 14 mile cab ride. If the distance traveled is less than or equal to 12 miles the cost is $2.00 a mile, and if the distance traveled is more than 12 miles the cost is $1.50 a mile. Assign the final cost to the variable total.
Solution.
# distance variable given
distance = 14
# Set conditions
if distance <= 12:
    # rate will be 2 if the distance is less than or equal to 12
    rate = 2.00
if distance > 12:
    # rate will be 1.5 if the distance is greater than 12
    rate = 1.50
# Calculate trip cost
total = distance * rate
# Print final statement
print("Total cost of trip: " + str(total))

Activity 4.14.6.

Write a program to prompt for a score between 0.0 and 1.0. If the score is out of range, print an error message. If the score is between 0.0 and 1.0, print a grade using the following table:
 Score   Grade
>= 0.9     A
>= 0.8     B
>= 0.7     C
>= 0.6     D
 < 0.6     F
Enter score: 0.95
A

Activity 4.14.7.

Fix the example such that the cost of frozen yogurt is 0 if you pour exactly 1 lb. in your cup.
Solution.
# Initial weight is given
weight = 0.5
# Set conditionals
if weight < 1:
    # Set price to 1.45 when weight is less than 1
    price = 1.45
# Create condition for when weight is 1
if weight == 1:
    # Set price to 0 when weight is 1
    price = 0
if weight > 1:
    # Set price to 1.15 when weight is greater than 1
    price = 1.15
# calculate total using newly assigned variables
total = weight * price
# Print variables
print(weight)
print(price)
print(total)

Activity 4.14.8.

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

Activity 4.14.9.

3 criteria must be taken into account to identify leap years:
Write a program that takes a year as a parameter and sets leapYear equal to True if the year is a leap year, False otherwise. (use a few different years to test your work)
Solution.
year = 1900 #TEST WITH ANY YEAR
# Initializing leapYear to False since most years are not leap years
leapYear = False

# Use modulus to see if the year is divisible by 4
if year % 4 == 0:
    # If divisible by 4, use modulus to see if divisible by 100
    if year % 100 == 0:
        # if divisible by 4 and 100, use modulus to see if divisible by 400
        if year % 400 == 0:
            # if divisible by 4, 100, and 400 it is a leap year
            leapYear = True
    else: # if divisible by 4 and not 100 it is a leap year
        leapYear = True
print(leapYear)
''' Since leapYear started as False, we do not need to reset it to False
    for the instances that the year is not a leap year '''

# ANOTHER OPTION
year = 1900
leapYear = False
if year % 400 == 0:
    leapYear = True
elif year % 4 == 0 and year % 100 != 0:
    leapYear = True
print(leapYear)

Activity 4.14.10.

Finish the following code. It first sets n to a number input by a user. Convert the number from a string to an integer and set result to True if the number is an even number (evenly divisible by two) and False if it is odd. Note: use the modulo operator.
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