C program to calculate electricity bill

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

2365

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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