CODEWITHSUNDEEP
pythonif-statement
user10762356
user10762356

Reputation:

Need guidance for nesting if statement within if statements

To give you some context, the project I'm doing is creating a bill based on inputs from the user, and part of the project outlines a discount if the user would like to pay within 10 days.

Our teacher said we HAVE to nest if statements in our project but I'm not sure why or how.

I missed the nesting lesson and I have no idea how to sucsessfully implement an if statement and everything I can see online is way above my skill level, and I dont see where I'm going wrong with my code. 

#finding out the potential discount for paying within 10 days

if pay == "no":
    discount = 0

    if pay == "yes" and firstBill > 100 and firstBill < 200:
        discount = (firstBill * 0.015)

    elif pay == "yes" and firstBill > 200 and firstBill < 400:
        discount = (firstBill * 0.03)

    elif pay == "yes" and firstBill > 400 and firstBill < 800:
        discount = (firstBill * 0.04)

    elif  pay == "yes" and firstBill > 800:
        discount = (firstBill * 0.05)

    else:
        print("error")

else:
    print("error")

Upvotes: 0

Views: 68

Answers (1)

iz_
iz_

Reputation: 16573

Do you mean something like this? The first if checks if pay is "no" and skips the rest of the code. Everything under elif pay == "yes": will only execute if pay is "yes".

if pay == "no":
    discount = 0
elif pay == "yes":
    if 100 <= firstBill < 200:
        discount = (firstBill * 0.015)
    elif 200 <= firstBill < 400:
        discount = (firstBill * 0.03)
    elif 400 <= firstBill < 800:
        discount = (firstBill * 0.04)
    elif firstBill >= 800:
        discount = (firstBill * 0.05)
    else:
        print("error")
else:
    print("error")

By the way, you can chain comparison operators like x < y < z. Also, your code prints "error" for EXACTLY 200 or EXACTLY 400 and so on. I'm assuming that was unintended and fixed that.

You can also write the if statements differently:

if pay == "yes":
    if 100 <= firstBill < 200:
        discount = (firstBill * 0.015)
    elif 200 <= firstBill < 400:
        discount = (firstBill * 0.03)
    elif 400 <= firstBill < 800:
        discount = (firstBill * 0.04)
    elif firstBill >= 800:
        discount = (firstBill * 0.05)
    else:
        print("error")
elif pay == "no":
    discount = 0
else:
    print("error")

And it will work exactly the same.

Upvotes: 2

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