Prompt Dialog Box:- Prompt is used to take inputs at Runtime through dialog box.
Example-1:
<html>
<head>
<script>
a = prompt('please enter your value');
document.write(a);
</script>
</head>
<body>
</body>
</html>
Example-2:
<html>
<head>
<script>
a = prompt('please enter your value',100);
document.write(a);
</script>
</head>
<body>
</body>
</html>
Example-3:
<html>
<head>
<script>
a = prompt('please enter your value');
document.write(a+'<br>');
b = typeof(a);
document.write(b);
</script>
</head>
<body>
</body>
</html>
Example-4:
<html>
<head>
<script>
a = prompt('please enter your value');
a = parseInt(a);
b = typeof(a);
document.write(a+'<br>');
document.write(b);
</script>
</head>
<body>
</body>
</html>
Example-5:
<html>
<head>
<script>
a = prompt('please enter 1st value');
a = parseInt(a);
b = prompt('please enter 2nd value');
b = parseInt(b);
c = a+b;
document.write(c);
</script>
</head>
<body>
</body>
</html>
Example-6:
<html>
<head>
<script>
a = 'abc';
a = parseInt(a);
document.write(a);
</script>
</head>
<body>
</body>
</html>
Note :
if parseInt conversion is not possible then it will return NaN ( Not a Number )
Example-1:
<html>
<head>
<script>
a = prompt('please enter your value');
document.write(a);
</script>
</head>
<body>
</body>
</html>
Example-2:
<html>
<head>
<script>
a = prompt('please enter your value',100);
document.write(a);
</script>
</head>
<body>
</body>
</html>
Example-3:
<html>
<head>
<script>
a = prompt('please enter your value');
document.write(a+'<br>');
b = typeof(a);
document.write(b);
</script>
</head>
<body>
</body>
</html>
Example-4:
<html>
<head>
<script>
a = prompt('please enter your value');
a = parseInt(a);
b = typeof(a);
document.write(a+'<br>');
document.write(b);
</script>
</head>
<body>
</body>
</html>
Example-5:
<html>
<head>
<script>
a = prompt('please enter 1st value');
a = parseInt(a);
b = prompt('please enter 2nd value');
b = parseInt(b);
c = a+b;
document.write(c);
</script>
</head>
<body>
</body>
</html>
Example-6:
<html>
<head>
<script>
a = 'abc';
a = parseInt(a);
document.write(a);
</script>
</head>
<body>
</body>
</html>
Note :
if parseInt conversion is not possible then it will return NaN ( Not a Number )
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