Electricity Bill Calculation

Per Unit Rate in TamilNadu 2020:

• For 0 to 100 units, the per unit is Zero
• For 0 to 200 units, for the First 100 unit the per unit cost is Zero  and           the next 100 units, the consumer shall pay Rs. 1.5 per unit.
• For 0 to 500 units, the consumer shall pay Rs. 0 for the first 100 units, for the next 100 units the consumer shall pay Rs. 2 per unit, for the next 300 units the unit cost is Rs.3 per unit
• For Above 500 units, the per unit cost is as shown in the table.

Program Code:

def des():

    print("...........................................")

    print('\t'"ELECTRICITY BILL CALCULATION")

    print("...........................................")

def calc():

    while(1):

        print('\t'"Consumer Details")

        print('\t'"~~~~~~~~~~~~~~~~")

        num=int(input("Enter Service Number: "))

        name=input("Enter Consumer Name: ")

        cur=int(input("Enter Current Month Reading: "))

        pre=int(input("Enter Previous Month reading: "))

        print('\n'"`````````````````````````````````````")

        print('\t'"Unit & Amount Calculation")

        print('\t'"~~~~~~~~~~~~~~~~~~~~~~~~~")

        units=cur - pre

        print("Number of Unit Consumed:",cur,"-",pre,"=",units)

        if(units<0):

            print("Invalid Input")

            exit(0)

        else:

            if(units>=0 and units<=100):   #Scheme 1 (0 to 100)

                Amount=units*0

                print("Amount      : Rs.",Amount)

                fixedcharge=0.00

                print("Fixed Amount: Rs.",fixedcharge)

            elif(units>100 and units<=200): #Scheme 2 (0 to 200)

                Amount=(100*0)+(units-100)*1.5

                print("Amount      : Rs.",Amount)

                fixedcharge=20.00

                print("Fixed Amount: Rs.",fixedcharge)

            elif(units>200 and units<=500): #Scheme 3 (0 to 500)

                Amount=(100*0)+(200-100)*2+(units-200)*3

                print("Amount      : Rs.",Amount)

                fixedcharge=30.00

                print("Fixed Amount: Rs.",fixedcharge)

            else:                           #Scheme 4 (>500)

                Amount=(100*0)+(200-100)*3.5+(500-200)*4.6+(units-500)*6.6

                print("Amount      : Rs.",Amount)

                fixedcharge=50.00

                print("Fixed Amount: Rs.",fixedcharge)

        Total= Amount+fixedcharge

        print("Total Amount:",Amount,"+",fixedcharge,"= Rs.",Total)

        print("`````````````````````````````````````")    

        print('\n'"*******************************")

        print('\t'"EB Bill Receipt")

        print('\t'"~~~~~~~~~~~~~~~")

        print("Service  Number :",num)

        print("Consumer Name   :",name)

        print("Units Consumed  :",units)

        print("Bill Amount     : Rs.",Total)

        print("*******************************")

        ch=input("Do u want 2 Continue? y/n: ")

        if ch=='n':

            break

        

#Function Call

des()

calc()

Output:

If you have any doubts, feel free to post it in comment Section.