Question

4.13 LAB: Interstate highway numbers Primary U.S. interstate highways are numbered 1-99. Odd numbers (like the...

4.13 LAB: Interstate highway numbers Primary U.S. interstate highways are numbered 1-99. Odd numbers (like the 5 or 95) go north/south, and evens (like the 10 or 90) go east/west. Auxiliary highways are numbered 100-999, and service the primary highway indicated by the rightmost two digits. Thus, I-405 services I-5, and I-290 services I-90. Given a highway number, indicate whether it is a primary or auxiliary highway. If auxiliary, indicate what primary highway it serves. Also indicate if the (primary) highway runs north/south or east/west.

Ex: If the input is: 90

The output is: I-90 is primary, going east/west. Ex: if the input is: 290 The output is: I-290 is auxiliary, serving I-90, going east/west.

Ex: if the input is 0

The output is: 0 is not a valid interstate highway number.

Python 3

Homework Answers

Answer #1
highway_number = int(input())
if highway_number >= 1 and highway_number <= 99:
    if highway_number % 2 == 0:
        print("I-"+str(highway_number)+" is primary, going east/west.")
    else:
        print("I-"+str(highway_number)+" is primary, going north/south.")
elif highway_number >= 100 and highway_number <= 999:
    n = highway_number % 100
    if n % 2 == 0:
        print("I-"+str(highway_number)+" is auxiliary, serving I-"+str(n)+", going east/west.")
    else:
        print("I-"+str(highway_number)+" is auxiliary, serving I-"+str(n)+", going north/south.")
else:
    print(str(highway_number)+" is not a valid interstate highway number.")

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