Productos calcular tasa

by cristianromagnoli

JavaScript

function calcTax( amount , tax ){
    return amount * ( tax / 100 );
}

var purchase = 0, prompted = 0;

do{
    purchase = purchase + prompted;
    prompted = parseFloat(prompt("Enter purchase amount (0 to finish):"));
}while(prompted !== 0);

var tax = calcTax( purchase , 21 );
var total = purchase + tax;

document.write(
    "Purchase Amount: " + purchase +"<br/>", 
    "Tax: " + tax +"<br/>",
    "Grand Total: " + total +"<br/>"
);