C program to calculate electricity bill

In this tutorial, we will discuss C program to calculate electricity bill

In this post, we will learn how to calculate electricity bill using if condition in the C programming language

We can calculate monthly electric power usage in many ways.

In this tutorial, we display two programs calculating electricity bill in Java.

Before we write a program to calculate the electricity bill, we must understand electricity charges rates.

/*1 - 100 unit - 5/= 
101-200 unit - 7/= 
201-300 unit - 10/= 
above 300 - 15/=*/
//for example

Example

We can explain of this program as follows

Declare total unit consumed by the customer using the variable unit.
When the unit consumed less or equal to 100 units, calculates the total amount of usage =unit*5
When unit consumed between 100 to 200 units, calculates the total amount of usage =(100*5)+(unit-100)*7)
When unit consumed between 200 to 300 units ,calculates total amount of usage =100*5)+(100*7)+(unit-200)*10
When unit consumed above 300 units ,calculates total amount of usage =(100*5)+(100*7)+(100*10)+(unit-300)*15
No additional charge

Electricity bill calculation – using normal method

program 1

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int unit=311; //declare variable unit

    //first we understand unit prize
    /*1 - 100 unit - 5/=
      101-200 unit -  7/=
      201-300 unit - 10/=
      above 300  - 15/=*/

      if(unit<=100){//when this statement is true
    printf("%d",unit*5);//this statement is Executed otherwise
}
else if(unit<=200){//when this statement is true
    printf("%d",(100*5)+(unit-100)*7);//this statement is Executed otherwise
}
else if(unit<=300){//when this statement is true
    printf("%d",(100*5)+(100*7)+(unit-200)*10);//this statement is Executed otherwise
}
else if(unit>300){//when this statement is true
    printf("%d",(100*5)+(100*7)+(100*10)+(unit-300)*15);//this statement is Executed otherwise
}
else{//when all statements are false
    printf("No value");//this statement is Executed
}
getch();
    return 0;
}

When the above code is executed, it produces the following results

Electricity bill calculation – using take input from the user

Program 2

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int unit; //declare variable unit

    //first we understand unit prize
    /*1 - 100 unit - 5/=
      101-200 unit -  7/=
      201-300 unit - 10/=
      above 300  - 15/=*/
      printf("Enter total units consumed: ");
      scanf("%d",&unit);

      if(unit<=100){//when this statement is true
            printf("Bill amount is: ");
    printf("%d",unit*5);//this statement is Executed otherwise
}
else if(unit<=200){//when this statement is true
        printf("Bill amount is: ");
    printf("%d",(100*5)+(unit-100)*7);//this statement is Executed otherwise
}
else if(unit<=300){//when this statement is true
    printf("Bill amount is: ");
    printf("%d",(100*5)+(100*7)+(unit-200)*10);//this statement is Executed otherwise
}
else{//when all statements are false
    printf("Bill amount is: ");//consumed above 30 units
    printf("%d",(100*5)+(100*7)+(100*10)+(unit-300)*15);
    //this statement is Executed otherwise
}
getch();
    return 0;
}

When the above code is compiled and executed, it produces the following results

Enter total units consumed: 235
Bill amount is: 1550

Electricity bill calculation – using Using & operator

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int unit; //declare variable unit

    //first we understand unit prize
    /*1 - 100 unit - 5/=
      101-200 unit -  7/=
      201-300 unit - 10/=
      above 300  - 15/=
for example*/
      printf("Enter total units consumed: ");
      scanf("%d",&unit);

      if(unit>0 && unit<=100){//when this statement is true
            printf("Bill amount is: ");
    printf("%d",unit*5);//this statement is Executed otherwise
}
else if(unit>100 && unit<=200){//when this statement is true
        printf("Bill amount is: ");
    printf("%d",(100*5)+(unit-100)*7);//this statement is Executed otherwise
}
else if(unit >200 && unit<=300){//when this statement is true
    printf("Bill amount is: ");
    printf("%d",(100*5)+(100*7)+(unit-200)*10);//this statement is Executed otherwise
}
else if(unit >300){//when all statements are false
    printf("Bill amount is: ");//consumed above 30 units
    printf("%d",(100*5)+(100*7)+(100*10)+(unit-300)*15);
    //this statement is Executed otherwise
}
else{//all statements are false
    printf("No charges");
}//this statement is executed
getch();
    return 0;
}

When the above code is compiled and executed, it produces the following results

Enter total units consumed: 250
Bill amount is: 1700

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