电力局账单计算器：
电费 (eb) 计算器是一种用于根据消耗的电量和适用的电费率估算用电量成本的工具。
公式：
电费=用电量（kwh）x每度电价。
示例：
# function to calculate electricity bill based on unit consumption
def eb(unit):
# first 100 units are free
if unit <= 100:
cost = 0.00
# for 101–200 units, charge ₹2.50 per unit above 100
elif unit <= 200:
cost = (unit - 100) * 2.50
# for 201–300 units, add ₹3.00 per unit above 200
elif unit <= 300:
cost = 100 * 2.5 + (unit - 200) * 3.00
# for 301–400 units, add ₹4.50 per unit above 300
elif unit <= 400:
cost = 100 * 2.5 + 100 * 3 + (unit - 300) * 4.50
# for units above 400, add ₹6.00 per unit above 400
else:
cost = 100 * 2.5 + 100 * 3 + 100 * 4.5 + (unit - 400) * 6.00
# return the total calculated cost
return cost
# input the total units consumed
unit = int(input("enter the unit: "))
# call the `eb` function to calculate the electricity bill
eb_bill = eb(unit)
# display the calculated electricity bill amount
print("electricity bill amount:", eb_bill)
输出：
Enter the unit:345 Electricity bill amount: 752.5
