C Program to Calculate Electricity Bill

In this tutorial, i am going to show you how to calculate electricity bill in c program.

Using the following condition, write a c program to calculate electricity unit charge and calculate the total electricity bill according to the given condition:

  • For first 50 units Rs. 0.50/unit
  • For next 100 units Rs. 0.75/unit
  • For next 100 units Rs. 1.20/unit
  • For unit above 250 Rs. 1.50/unit
  • An additional surcharge of 20% is added to the bill.

C Program to Calculate Electricity Bill

/**
 * C program to calculate total electricity bill
 */
#include <stdio.h>
int main()
{
    int unit;
    float amt, total_amt, sur_charge;
    /* Input unit consumed from user */
    printf("Enter total units consumed: ");
    scanf("%d", &unit);
    /* Calculate electricity bill according to given conditions */
    if(unit <= 50)
    {
        amt = unit * 0.50;
    }
    else if(unit <= 150)
    {
        amt = 25 + ((unit-50) * 0.75);
    }
    else if(unit <= 250)
    {
        amt = 100 + ((unit-150) * 1.20);
    }
    else
    {
        amt = 220 + ((unit-250) * 1.50);
    }
    /*
     * Calculate total electricity bill
     * after adding surcharge
     */
    sur_charge = amt * 0.20;
    total_amt  = amt + sur_charge;
    printf("Electricity Bill = Rs. %.2f", total_amt);
    return 0;
}

The result of above c program; as follows:

Enter total units consumed: 120
Electricity Bill = Rs. 93.00

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