Hi guys some JavaScript examples?

[Joyce137298]

Hi guys, i'm a newbie on coding and I just started learning it.
I learned that there are variables like "String", "Number" and "Boolean".
Can someone gimme examples fer each variables please this would help me alot.

[Trickstar]

So you know what a comment is in JavaScript write? You must know in order to make it easier to read code, anything after "//" on one line is a comment and is not used as code. You said you were new to coding so I was just pointing that out in case you didn't know. But yep, heres your examples.

// The following line is a string
var bobIsCool = "Bob is cool"; // a string is contained in two quotation marks and cannot be handled in math expressions
// The following is a number (which can be either a floating point or an integer)
var exampleOfInteger = 2; // this was an integer
var exampleOfFloatingPoint = 1.3; // this was floating point
var trueFalse = true; // this is boolean, which is either true or false

[Joyce137298]

Thank you for your help, and also thank you for the side informational, i didn't know that.

[felgall]

String, Number, and Boolean are actually objects in JavaScript - those examples provides are actually not String, Number, and Boolean - they are primitive strings, numbers, and booleans - which is completely different.

The objects with the same name (but the leading capital letter instead of lowercase) can be used to convert string, number, and boolean into String, Number and Boolean where in the case of the first two you then have a number of methods that can be applied - such as taking a substring of the String or converting the number to display with a fixed number of decimal places (not sure why anyone would ever use Boolean objects for anything) though).

For more information about the built in objects in JavaScript and the methods that they supply for manipulating your data see http://javascriptexample.net/objects.php

[Joyce137298]

Uhhh, i'm starting to get confused here. I tried the Java Script Sand box to practice some but when I copied some website page source information that was java script into the sand box, it had alot of errors.






This was the sandbox I used http://railsdotnext.com/experiment/jssandbox.html

The reason i'm getting into this stuff because i want to eventually code my own games with Unity Engine and on its website it said it supported JavaScript language. I figured this was the first step to creating games.

[Old Pedant]

Try this example. Maybe it will help clarify things:

<script type="text/javascript">

var s = new String( 33 ); 
var n = new Number( "713" ); 
var b = new Boolean( 3 > 5 ); 

document.write( typeof(s) + "::" + s + "<br/>");
document.write( typeof(n) + "::" + n + "<br/>" );
document.write( typeof(b) + "::" + b + "<br/>" );

s = String(33);
n = Number("731");
b = Boolean( 3 > 5 );

document.write( typeof(s) + "::" + s  + "<br/>");
document.write( typeof(n) + "::" + n  + "<br/>");
document.write( typeof(b) + "::" + b  + "<br/>");

s = "woof";
n = 3.1415;
b = 3 <= 7;

document.write( typeof(s) + "::" + s  + "<br/>");
document.write( typeof(n) + "::" + n  + "<br/>");
document.write( typeof(b) + "::" + b  + "<br/>");

</script>

[Old Pedant]

when I copied some website page source information that was java script into the sand box, it had alot of errors.

It is more than likely that the JS you copied was dependent on the HTML in the website page and, when you copied only the JS, it was trying to reference objects that didn't exist in the sand box.

HINT: You have a long road ahead of you.