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JavaScript - Making The Result Of A Multiplication A Two Decimal Number.
Hello,
Could someone help me with this problem? I'd like the posted result to be a number with two decimals. I know how to make this normally but not with this kind of script. Thanks very much in advance! Code: <html>
<head>
<script type="text/javascript">
function calcResult(){
document.getElementById('result').innerHTML = '';
var num1 = newNumber(document.getElementById('txt1').value);
var num2 = 0.429;
var num3 = 1;
if(isNaN(num1) || isNaN(num2)){
alert('Please enter a number');
} else {
document.getElementById('result').innerHTML = num1 * num2;
document.getElementById('entry').innerHTML = num1 * num3;
}
}
window.onload=function(){
document.getElementById('btnCalc').onclick = calcResult;
document.getElementById('btnCalc').onclick = calcEntry;
}
</script>
</head>
<body>
<p>
<input type="text" id="txt1" size="5" value="" maxlength="5" />
<button id="btnCalc">Calculate</button>
</p>
<p>
<span id="entry"></span> × 0.429 = <span id="result"></span>
</p>
</body>
</html>
Similar TutorialsHello: I have this js function: Code: <script type="text/javascript">
function updatesum() {
document.PaymentForm.newbalance.value = (document.PaymentForm.balance.value -0) - (document.PaymentForm.paymentamount.value -0);
}
</script>
I want to round the value of Code: document.PaymentForm.newbalance.value to two decimal points. May I request some assistance! I'm fairly new to programming, I just started JavaScript and I did read the rules. I am a student and will not post my code asking someone to do my homework. I just need a little guidance. For my assignment, when a webpage is loaded, it prompts the user to enter hours worked, their pay rate and tax rate, then use a function to calculate the net weekly pay, then display all numbers on the screen. Now I have this working and it appears on the screen, but I need to limit the hours worked to a whole number and the pay and tax rates need to only show 2 digits on either side of the decimal. From searching I found a lot of information about ParceInt, ParceFloat and toFixed, but cannot get these to work. Either these are not correct or I'm not using them correctly. Below are samples of 2 of the prompts. Can someone help me with this problem? Also is it better the handle this problem at the prompt or in the function or where it writes to the screen? Code: var hours_worked = prompt ("How many hours did you work?", "");
parseInt(hours_worked);
var pay_rate = prompt ("What is your pay rate?", "");
parseFloat(pay_rate);
Hopefully the subject was good enough and the content descriptive to understand when I'm trying to accomplish. Brian I want to build a web form that will allow users to enter 3 different numbers and get a result. The answer is arrived at by the following. Enter 3 variable A, B, and C. Then A / B = D. Then C / D = the Answer. Is there a way to set that up as a single click script? Everything I have tried has failed hard. Hi, I'm new here, and I'm a programming newb but am very interested in learning and possibly pursuing programming in the future. As such, I'm taking an intro to Javascript class at my university, and our homework is to make a function that when called upon makes a diamond out of *'s. It is supposed to do so by prompting a user for an int and then makes a diamond shaped object with the inputted number of stars in the middle of the diamond. an example of what this would look like (if a user entered in "5" to the prompt): *<br> ***<br> *****<br> ***<br> *<br> I am not sure how to set up this for loop, and have been trying so many different codes and have come nowhere close. Any help or insight would be so much appreciated. Hi, I am having a hard time to display a table with user preference of how many rows/columns to create a multiplication table. I think I have to user DOM but I am not sure and I am not sure how to use it. My question is, how do I get the user input to use as a dynamic array input in a for loop so I can create the multiplication table using CSS ? Here is my code: [CODE] Hi, I am having a hard time to display a table with user preference of how many rows/columns to create a multiplication table. I think I have to user DOM but I am not sure and I am not sure how to use it. My question is, how do I get the user input to use as a dynamic array input in a for loop so I can create the multiplication table using CSS ? Here is my code: Code: <?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.0 Strict//EN' 'http://www.w3c.org/TR/xhtml1/DTD/xhtml1-strict.dtd'>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title> Multiplication table web page </title>
<style type="text/css">
h2 {text-align: center;}
table {position:absolute;left:300px;}
</style>
</head>
<body>
<h2>Multiplication Table</h2>
<script type="text/javascript">
<!--
var size;
do {
size = prompt("What size table do you want?","10");
} while ((size < 1) || (size > 15));
document.write("<table border=\"5\" cellpadding=\"5\" cellspacing=\"5\">");
document.write("<tr><th> *</th>");
for(var i = 0; i < 10; i++)
{
for(var j = 0; j < 10; j++)
{
size = i * j;
}
}
document.write("</table>");
// -->
</script>
</body>
</html>
I am trying to allow the user to type in two numbers and then a multiplication table pops up below it. It works however I cannot figure out how to make the first row be 0,1,2,3,4,5..ect and same for the first column in each row going down the table. Here is my code.. Code: <html>
<head>
<title>Untitled</title>
<script>
function f(x,y)
{
if((x < 3) || (y < 3) || (x > 10) || (y > 10)){
alert("Please enter numbers between 3 and 7")
}else{
s = "<table border = '1'>"
var total;
for (i=0; i<=x; i++){
s+= "<tr></tr>";
for (j=0; j <= y; j++){
total = i * j;
s+="<td>"+ total +"</td>"
}
}
s+="</table>"
document.getElementById("Q").innerHTML+=s
}
}
</script>
</head>
<body>
[enter a number between 3 and 10]
<form id = "form1">
<input id = "a" value = "6"> by <input id = "b" value = "8"><br>
<input type = "button" onclick = "f(a.value,b.value)" value = "Click here when ready!">
<br>
</form>
<div id = "Q"></div>
</body>
</html>
Hello, I am trying to write a javascript page that shuffles an array of questions ( 1x1 , 1x2, 1x3 - 1x12), prints them, then has the user type in the answer, then checks them to make sure the user answer is correct. I have looked up a lot of source code for javascript "quiz" but they all are multiple choice answers and the questions are not shuffled. This is as far as I have gotten, but now I am not sure how to take the user input text and compare them to the answer / question array to make sure to check. Code: <html>
<head>
<title> Slick Math </title>
<script type="text/javascript">
var quest = new Array;
var ans = new Array;
var questprint = new Array;
quest[0] = "1 x 1 ";
quest[1] = "1 x 2 ";
quest[2] = "1 x 3 ";
quest[3] = "1 x 4 ";
quest[4] = "1 x 5 ";
quest[5] = "1 x 6 ";
quest[6] = "1 x 7 ";
quest[7] = "1 x 8 ";
quest[8] = "1 x 9 ";
quest[9] = "1 x 10 ";
quest[10] = "1 x 11 ";
quest[11] = "1 x 12 ";
questprint[0] = quest[0]+"<input type='text' name='q0'></input><br/>";
questprint[1] = quest[1]+"<input type='text' name='q1'></input><br/>";
questprint[2] = quest[2]+"<input type='text' name='q2'></input><br/>";
questprint[3] = quest[3]+"<input type='text' name='q3'></input><br/>";
questprint[4] = quest[4]+"<input type='text' name='q4'></input><br/>";
questprint[5] = quest[5]+"<input type='text' name='q5'></input><br/>";
questprint[6] = quest[6]+"<input type='text' name='q6'></input><br/>";
questprint[7] = quest[7]+"<input type='text' name='q7'></input><br/>";
questprint[8] = quest[8]+"<input type='text' name='q8'></input><br/>";
questprint[9] = quest[9]+"<input type='text' name='q9'></input><br/>";
questprint[10] = quest[10]+"<input type='text' name='q10'></input><br/>";
questprint[11] = quest[11]+"<input type='text' name='q11'></input><br/>";
var score = 0;
ans[0] = 1;
ans[1] = 2;
ans[2] = 3;
ans[3] = 4;
ans[4] = 5;
ans[5] = 6;
ans[6] = 7;
ans[7] = 8;
ans[8] = 9;
ans[9] = 10;
ans[10] = 11;
ans[11] = 12;
function shuffle() {
return (Math.round(Math.random())-.5);
}
questprint.sort(shuffle);
</script>
</head>
<body>
<h1>Slick Math</h1>
<form name="form">
<script type="text/javascript">
document.write(questprint[0]);
document.write(questprint[1]);
document.write(questprint[2]);
document.write(questprint[3]);
document.write(questprint[4]);
document.write(questprint[5]);
document.write(questprint[6]);
document.write(questprint[7]);
document.write(questprint[8]);
document.write(questprint[9]);
document.write(questprint[10]);
document.write(questprint[11]);
</script>
</form>
</body>
</html>
Thanks =] I have javascript function which calculates the product of two numbers. function fnCalculate() { var lat1=price * num; } Here for eg if price is 19.50 and num is 1 then o/p should be 19.50 and not 19.5 as its resturning now. Also if price is 15.00 and num is 1 then o/p should be 15.00 and no just 15. Is it possible ... someone please help Ok, just to be honest this is for my assignment from my University, I have completed the whole code myself I just can't seem to get just one little thing. Code: function GenerateTables(){
var start = document.tables.start.value;
var end = document.tables.end.value;
var size = document.tables.size.value;
for (start; start <= end; start++) {
document.write("<table width='100' align='center'>")
document.write("<caption><b>Table of </b>" + start + "</caption><br>")
document.write("</table><br>")
for (var i = 1; i <= size; i++) {
document.write("<table border=1 align='center'>")
document.write("<tr height=40 align='center'>")
document.write("<td width=40 align='center'>" + start + "</td>")
document.write("<td width=40 align='center'> * </td>")
document.write("<td width=40 align='center'>" + i + "</td>")
document.write("<td width=40 align='center'> = </td>")
document.write("<td width=40 align='center'>" + start * i + "</td>")
document.write("</tr>")
document.write("</table>")
}
}
}
The function generates multiplication tables depending on the input user provides using this interface (given below). And it generates them like this (given below). Now what I want is to generate those tables sideways not downwards. Not all the tables, but it should complete one table downwards, then start the new table on its side. I can't seem to figure out anything that would make that happen, and ideas would be appreciated, thanks. Regards, Papichoolo. I have a function below where every time a question is submitted, it will add a new row in the table with a textbox which allows numbers entry only. My question is that I don't know how to code these features in this function: 1: I want the text box to be between 0 and 100, so if text box contains a number which is above 100, it will automatically change the number to the maximum number which is 100. Does any one know how to code this in my function below in javascript: Code: function insertQuestion(form)
{
var row = document.createElement("tr");
var cell, input;
cell = document.createElement("td");
cell.className = "weight";
input = document.createElement("input");
input.name = "weight_" + qnum;
input.onkeypress = "return isNumberKey(event)";
cell.appendChild(input);
row.appendChild(cell);
}
I am trying to figure out how to make a random number I can plug into a script count down from that number at certain times of the day until it reaches 0. I would like it to reset itself at midnight every day. I'm trying to make it work with a script I found on here that resets itself at midnight every day. So instead of it counting down too fast, it would count down to the next number after a randomly generated number of minutes until it reaches 0. But it wouldn't necessarily have to end at 0 at midnight. It could go from 845 to 323 at the end of the day at a slower pace. Is that possible?
When I used toFixed() method on a number, I thought that this method round a number to a specified approximation, but I got a surprising result, the number became string! 15.23689 .toFixed ( 2 ) ==> "15.24" So does it convert the number into string? Dear All, I can check now a field is isNumeric via this method var isNumeric = /^[0-9.]+$/;. My problem now user can put two or more decimal and I want to limit just to single decimal and only 2 numbers before the decimal? How to edit please? The way I have my code now inorder to create .XX places I use Code: var valueY=Math.round(valueX*100)/100; That way if valueX=15.6898 it would give valueY=15.69. but the problem arises when I want it valueX=15.6 to display valueY=15.60 I did some research and people said to use .toFixed(2) but i can't get it to add in the zero if it isn't already there. Any help I would be very helpful. I'm trying to write a pi calculator that shows a comparison of the calculated value to the actual value. It works, but the output of the comparison shows only the first two decimal spots, followed by two 9s. Why is it showing two 9s and how can I make it more precise? Code:
<head>
<title>
Pi Calculator
</title>
<script language="JavaScript">
function calcpi(digitsn) {
p = 1;
s = 0;
for (c = 3; c < digitsn; c += 2) {
if (s == 0) {
p -= 1/c;
s = 1;
} else {
p += 1/c;
s = 0;
}
}
p *= 4;
return p;
}
function hid(input) { //Highlight Incorrect Digits
pi = "3.14159265358979323846".split('');
input = input.toString().split('');
result = "";
for (c = 0; c < input.length; c++) {
if (input[c] != pi[c]) {
//result += "; " + input[c] + "!=" + pi[c];
result += "<span style='background-color:red'>" + input[c] + "</span>";
} else {
result += input[c];
}
}
return result;
}
</script>
</head>
<body>
Repeat algorithm x many times:<br/>
<input type="text" value="10000" id="digitsx"/><br/>
<input type="button" onClick="document.getElementById('answer').value=calcpi(parseInt(document.getElementById('digitsx').value)).toString()" value="Calculate"/><br/>
Result:<br/>
<input type="text" readonly id="answer"/><br/>
Correct value:<br/>
<input type="text" readonly value="3.14159265358979323846"/><br/>
<input type="button" value="Compare" onClick="document.getElementById('comparison').innerHTML = hid('3.1499')"/>
<div id="comparison"/>
</body>
Hi.. I have javascript code with computation, but I have problem in my result because it was not round off or fixed into two decimal places only. here is my code: Code: <script type="text/javascript">
function test_(cmpd) {
var len_ = (document.frmMain.elements.length) - 1;
for (i=0; i <= len_; i++ ) {
var strPos_ = document.frmMain.elements[i].id.indexOf(cmpd)
if (strPos_ != -1) {
var strPos = document.frmMain.elements[i].id.indexOf("_");
var strId = document.frmMain.elements[i].id.slice(strPos + 1) + "_" + document.frmMain.elements[i].id.slice(0,strPos)
// this is the computation that I need to fixed the result into two decimal places
document.frmMain.elements[i].value = document.getElementById(strId).value * document.getElementById('mult').value;
}
}
}
</script>
Thank you so much Hi All, Im currently working on a bidding application built within ASP.Net and i have found this javascript snippet to only allow numeric values in the desired <asp:textbox> which is working fine, but i want to allow the user to add a decimal place. For example, say the bid is 1.50 they should be allowed to enter 1.51 but as i cant imput (.) i end up putting in 151 heres the snippet it may be a slight modification but im new to javascript so any help of knowledge will be highly appreciated Code: function isNumberKey(evt)
{
var charCode = (evt.which) ? evt.which : event.keyCode
if (charCode > 31 && (charCode < 48 || charCode > 57))
return false;
return true;
}
thanks in advance I am trouble in comparing decimal number. var1 = 0.25 var2 = 0.50 if (var1<var2) { alert("Value is less than minimum") } else { return true; } How can I make it work. Thanks for help in advance Hello all, How to set decimal point in javascript ? e.g. var num1=23.12345; I want output as 23.12 How can i do this ? Please, guide me. Thanks I have a mortgage calc that is adding an extra decimal place to my interest rate. To see this in action go to: http://www.keithknowles.com/elmtree/mortgagecalc2.htm Change the interest rate to 7.5 Click Calculate Payment Click Create Amortization Chart On the following screen you'll see a recap of your data and the interest rate will now say 7.55. Same thing happens if you enter 6.2. Next screen shows 6.22/ I've attached the html and js files in a zip. Any help is greatly appreciated. Thanks. |
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