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C Program 2 – Electricity Bill calculation

This program is to display the electricity bill calculation based on the number of units consumed every month

Input : the number of units – variable name – unit

Output – Amount of rupee – variable name – amount


Units Rupees
1-50 units 0.75/unit
51-100 0.85/unit
101-200 1.50/unit
201-300 2.20/unit
>300 3.00/unit

In all the cases, there will be service charge of Rs.20 will be collected.

#include <stdio.h>
#include <conio.h>
int main()
    float amount=0,units;;
    printf("Enter the number of units");
    scanf("%f", &units);
    if(units <=50)
     amount = units * 0.75;       
    else if(units >50 && units <=100)
         amount=0.75 * 50 + 0.85*(units-50);
    else if(units >100 && units <200)
         amount=(0.75*50) + (0.85*50 )+ (1.5 *(units-100));
    else if(units >200 && units <300)
         amount=(0.75*50) + (0.85*50 )+ (1.5 *100) + (2.20 *(units-200));
         amount=(0.75*50) + (0.85*50 )+ (1.5 *100) + (2.20 * 100) +(3.0*(units-300));
    printf("The total electricity bill is %f", amount);
    return 0;


  1. please write few line, it will be easy to understand

  2. too short...please extend it

  3. i need c code for spot billing machine

  4. helps very good...!!!!

  5. if th units used is greater than 300 an intrest of 15% wil b given then hw 2 modify ys pgm

  6. it gies good ideas"THANK U".good

  7. dear sir ,
    i wants write a program in c language to print an item (or product) bill with use of item_name, item_price, quantity_of_items,sell_item and total_of_amount.
    so i need a help to make this type of program in c language.


  8. Helps very much yaar...!And could understand it very clearly.Thanks..!


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