Python
# Program for bill discount system
amount = float(input("Enter total bill amount: "))
if amount < 0:
print("Amount cannot be negative.")
elif amount < 1000:
discount = 0
elif amount < 5000:
discount = 0.05 * amount
elif amount < 10000:
discount = 0.10 * amount
else:
discount = 0.15 * amount
payable = amount - discount
print("Discount:", discount)
print("Amount to be paid:", payable)Output
Enter total bill amount: 6000 Discount: 600.0 Amount to be paid: 5400.0
We use tiered discount slabs using if-elif-else. Each branch computes a discount percentage and subtracts it from the original amount.