C Program to Calculate Electricity Power Bill

 #include<stdio.h>

void main()

{

    int units;

    int unitcost;

    int bill;


    printf("Enter the number of units: ");

    scanf("%d",&units);


    if(units <= 30)

        unitcost = 1;

    else if(units <= 50)

        unitcost = 2;

    else if(units <= 100)

        unitcost = 3;

    else

        unitcost = 10;


    bill = units * unitcost;


    printf("Total Power Bill = %d",bill);

}

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