C program to generate an electricity bill

Based on the units consumed by the user, the electricity bill is generated. If number of units consumed are more then, the rate of a unit charge will also increase.

The logic applied if minimum units are consumed by the user is as follows −

if (units < 50){
   amt = units * 3.50;
   unitcharg = 25;
}

The logic applied if units are in between 50 to 100 is given below −

else if (units <= 100){
   amt = 130 + ((units - 50 ) * 4.25);
   unitcharg = 35;
}

The logic applied if units are in between 100 to 200 is as stated below −

else if (units <= 200){
   amt = 130 + 162.50 + ((units - 100 ) * 5.26);
   unitcharg = 45;
}

The logic applied if number of units are more than 200 is mentioned below −

amt = 130 + 162.50 + 526 + ((units - 200 ) * 7.75);
unitcharg = 55;

Therefore, the final amount will be generated with the logic as given below −

total= amt+ unitcharg;

Example

Following is the C Program to generate an electricity bill −

 Live Demo

#include <stdio.h>
int main(){
   int units;
   float amt, unitcharg, total;
   printf(" Enter no of units consumed : ");
   scanf("%d", &units);
   if (units < 50){
      amt = units * 3.50;
      unitcharg = 25;
   }else if (units <= 100){
      amt = 130 + ((units - 50 ) * 4.25);
      unitcharg = 35;
   }else if (units <= 200){
      amt = 130 + 162.50 + ((units - 100 ) * 5.26);
      unitcharg = 45;
   }else{
      amt = 130 + 162.50 + 526 + ((units - 200 ) * 7.75);
      unitcharg = 55;
   }
   total= amt+ unitcharg;
   printf("electricity bill = %.2f", total);
   return 0;
}

Output

When the above program is executed, it produces the following result −

Enter no of units consumed: 280
electricity bill = 1493.50