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Bill Discount System in Python

Apply different discount slabs based on total bill amount.

BeginnerConditional ProgramsExample 17 of 20
bill-discount-system.py
1# Program for bill discount system
2

3amount = float(input("Enter total bill amount: "))
4

5if amount < 0:
6    print("Amount cannot be negative.")
7elif amount < 1000:
8    discount = 0
9elif amount < 5000:
10    discount = 0.05 * amount
11elif amount < 10000:
12    discount = 0.10 * amount
13else:
14    discount = 0.15 * amount
15

16payable = amount - discount
17

18print("Discount:", discount)
19print("Amount to be paid:", payable)

Output

Enter total bill amount: 6000
Discount: 600.0
Amount to be paid: 5400.0

What's going on

6000 sits in the 10% slab, so discount is 600. Put 6000 in the first branch by using the wrong comparison and you give 0%. The last else is 15% — forget it and a 20000 bill gets no extra cut.

After this program

If the idea is still fuzzy, read Day 8: Conditional Statements in the Python course. For a short check, try the Python quiz (300 questions). Stay with all 20 conditional programs, or see every topic on Python exercises.

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