How to Calculate a Baseball Ticket in JavaScript

JavaScript offers an easy scripting solution for quick calculations needed inside a Web browser. Particularly, mathematical operations done to get a total cost or calculate tax on an item such as a baseball ticket require only that the programmer somehow provide a ticket price, and relevant tax and fee information. After that, it is simply a matter of doing the math, and wrapping the calculations in a function for ease of use.

Things You'll Need

• Text Editor
• Web Browser

Instructions

1. Begin the script, and create a baseball calculation function, that takes as its arguments the number of baseball tickets and the price:

   <script type="text/javascript">
   function calcBaseballTickets(num, cost){
   }
   </script>

2. Calculate the total cost of the tickets:

   function calcBaseballTickets(num, cost){

   var total = num * cost;

   }

3. Add the applicable sales tax to the price. This example assumes a sales tax of 3 percent:

   function calcBaseballTickets(num, cost){

   var total = num * cost;
   total += total * (.03);

   }

4. Add any service charges and print the result. This example assumes a service charge of $4:

   function calcBaseballTickets(num, cost){

   var total = num * cost;
   total += (total * (.03));
   total += 4;

   document.write("Total Cost is: " + total);
   }

5. Calculate the price for one ticket using the function. This will print "34.09" to the browser:

   <script type="text/javascript">

   function calcBaseballTickets(num, cost){
   var total = num * cost;
   total += (total * (.03));
   total += 4;
   document.write("Total Cost is: " + total);
   }

   var tickets = 1;
   var cost = 30.00;

   calcBaseball(tickets, cost);

   </script>

References

• W3C Schools: JavaScript Functions
• W3C Schools: Document write() Method