Trying to get a calculator to work with IF/THEN

JavaScript
1

I am trying to make a calculator that calculates the amount of words inputted (words) and multiplying it with a variable decided by an If/Then statement. The way I want it to work is that if there is 1-10,000 inputted it multiplies whatever that amount is by .29, and if there is 10,000-20,000 by .26, and anything more than 20,000 by .24. This is what I have come up with so far:


<script type="text/javascript"> 
      function wordcount(){ 
         var a = document.getElementById('words'); 
			if(a <= 10000){price = 0.29} else {price = 0.26};
           var wc = parseFloat(a.value); 
		 var final = wc*price;
		 alert('Your estimated price is: $' + final);
      }       
   </script>

I can’t get it to work at that point alone. If I had, I would have added another condition for 10k-20k. What am I doing wrong?

Sorry if this has already been answered in a similar way or if this is a very simple mistake on my part. I am very new to JS. Thanks in advance for the help.

2

You need to convert the string to a number value before you see how big it is-
and format the final cost to two decimal places with toFixed(2).
Make sure ‘words’ is an id, and not name=‘words’

If you don’t have fractions of words you can use parseInt(a.value,10) instead of parseFloat


function wordcountprice(){
	var price,  final, 
        a=document.getElementById('words'),  
	wc= parseFloat(a.value) || 0;

	if(wc<= 10000) price= .29;
	else price= wc<=20000? .26: 24;	
	final= (wc*price).toFixed(2);
	alert('Your estimated price is: $' + final);
}
3

Thank you for the quick reply! It really helped out! Here is the code you gave me. I made a couple of changes to make it work the way I wanted:


    function wordcountprice(){
	var price,  final, 
        a=document.getElementById('words'),  
	wc= parseFloat(a.value) || 0;
	if(wc< 10000) price= .29;
	else price= wc<20000? .26: .24;	
	final= (wc*price).toFixed(2);
	alert('Your estimated price is: $' + final);
}

It looks like the equal to argument wasn’t doing what I thought it was going to do. Thanks again!!