Javascript calculate quantity * price

问题

I'm trying to multiply the quantity and the price for each item for calculating the total, but I'm getting an error in my alert.

$.each(data.items, function(index, d){
    var calcultest = d.price * d.qty;
    alert(calcultest)
});

回答1:

Use parseFloat to convert string to Float

$.each(data.items, function(index, d){
    var Price = d.price.replace(",",".");
    var calcultest = parseFloat(Price) * parseFloat(d.qty);
    alert(calcultest.toString().replace(".",","));
});

FIDDLE

回答2:

Can you try this,

 $.each(data.items, function(index, d){
        var Price = d.price;
        Price = Price.replace(",",".");
        var calcultest = parseInt(Price) * parseInt(d.qty);            
        alert(calcultest);
 });

回答3:

If you want to create simple calculators with Javascript I would recommend you to take a look at “Appizy”.

It converts instantly a spreadsheet into a standalone web calculation tool (HTML+CSS+JAVASCRIPT). You don’t need to hardcode the whole interface and calculation formulas!

Just create your working calculator with Open- or LibreOffice and then use Appizy.

I hope it can help. Best, Nicolas

来源：https://stackoverflow.com/questions/21075595/javascript-calculate-quantity-price