I want to multiply the three numbers entered in three seprate textbox id is(PaperHeight & PaperWidth & Rate) and then get the product in fourth textbox id is (FinalRate)
I want to get the output when the submit button is clicked
following is my code
function btnclick() {
var PictureHeight = document.getElementById('PictureHeight').value;
var PictureWidth = document.getElementById('PictureWidth').value;
var Rate = document.getElementById('Rate').value;
var FinalRate = document.getElementById('FinalRate').value;
FinalRate = parseInt(PictureHeight) * parseInt(PictureWidth) * parseInt(Rate);
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3" crossorigin="anonymous">
<link rel="stylesheet" href="style.css">
<title>Calculator</title>
</head>
<body>
<center>
<h1>Rate Calculator</h1>
Enter the Picture dimention and Rate<br/>
<div class="container">
<div class="row">
<div class="col">
<div class="input-group input-group-sm mb-3">
<label class="col-sm-2 col-form-label col-form-label-sm">Width</label>
<input type="number" class="form-control" id="PictureWidth">
</div>
</div>
<div class="col">
<div class="input-group input-group-sm mb-3">
<label class="col-sm-2 col-form-label col-form-label-sm">Height</label>
<input type="number" class="form-control" id="PictureHeight">
</div>
</div>
<div class="col">
<div class="input-group input-group-sm mb-3">
<label class="col-sm-2 col-form-label col-form-label-sm">Rate</label>
<input type="number" class="form-control" id="Rate">
</div>
</div>
<br>
<div class="col">
<div class="input-group input-group-sm mb-3">
<label class="col-sm-2 col-form-label col-form-label-sm">₹</label>
<input type="number" class="form-control" id="FinalRate">
</div>
</div>
</div>
</div>
<button type="button" class="btn btn-primary" onclick="btnclick()">Submit</button>
</center>
<script src="script.js"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg+OMhuP+IlRH9sENBO0LRn5q+8nbTov4+1p" crossorigin="anonymous">
</script>
</body>
</html>>Solution :
get the element and then set the value.
function btnclick() {
var PictureHeight = document.getElementById('PictureHeight').value;
var PictureWidth = document.getElementById('PictureWidth').value;
var Rate = document.getElementById('Rate').value;
var FinalRate = document.getElementById('FinalRate');
FinalRate.value = parseInt(PictureHeight) * parseInt(PictureWidth) * parseInt(Rate);
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3" crossorigin="anonymous">
<link rel="stylesheet" href="style.css">
<title>Calculator</title>
</head>
<body>
<center>
<h1>Rate Calculator</h1>
Enter the Picture dimention and Rate<br/>
<div class="container">
<div class="row">
<div class="col">
<div class="input-group input-group-sm mb-3">
<label class="col-sm-2 col-form-label col-form-label-sm">Width</label>
<input type="number" class="form-control" id="PictureWidth">
</div>
</div>
<div class="col">
<div class="input-group input-group-sm mb-3">
<label class="col-sm-2 col-form-label col-form-label-sm">Height</label>
<input type="number" class="form-control" id="PictureHeight">
</div>
</div>
<div class="col">
<div class="input-group input-group-sm mb-3">
<label class="col-sm-2 col-form-label col-form-label-sm">Rate</label>
<input type="number" class="form-control" id="Rate">
</div>
</div>
<br>
<div class="col">
<div class="input-group input-group-sm mb-3">
<label class="col-sm-2 col-form-label col-form-label-sm">₹</label>
<input type="number" class="form-control" id="FinalRate">
</div>
</div>
</div>
</div>
<button type="button" class="btn btn-primary" onclick="btnclick()">Submit</button>
</center>
<script src="script.js"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg+OMhuP+IlRH9sENBO0LRn5q+8nbTov4+1p" crossorigin="anonymous">
</script>
</body>
</html>