из числа в строку

js/script.js

var str0 = String(300);
var val0 = 255;
var str1 = val0.toString();
var val1 = 255;
var val2 = 123.456789;
function funMake() {
document.write(str0 + '<br />');
document.write(str1 + '<br />');
document.write(val1.toString(2) + '<br />');
document.write('0' + val1.toString(8) + '<br />');
document.write('0x' + val1.toString(16) + '<br />');
document.write(val2.toFixed(2) + '<br />');
}

 var str0 = String(300);
var val0 = 255;
var str1 = val0.toString();
var val1 = 255;
var val2 = 123.456789;

function funMake() {
 document.write(str0 + '
');
 document.write(str1 + '
');
 document.write(val1.toString(2) + '
');
 document.write('0' + val1.toString(8) + '
');
 document.write('0x' + val1.toString(16) + '
');
 document.write(val2.toFixed(2) + '
');
}

index.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>New Page</title>
<script src="js/script.js"></script>
</head>
<body>
<script>
funMake();
</script>
</body>
</html>

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>New Page</title>
<script src="js/script.js"></script>
</head>
<body>
<script>
funMake();
</script>
</body>
</html>