Hi guys im doing a course which includes some JavaScript and I need help with the following question please,
Edit M150_TMA05_2008J_Q1_task01.html replacing the existing
JavaScript with the function,
getRoundedRandomNumber(aNumber). This function should
return whole numbers between 0 and aNumber, using
Math.round() as outlined above.
Write a comment to document what this function does, using an
extended comment (that is, one between /* and */). Also
provide appropriate single-line comments (the ones starting
with //) in the code, describing how it works. Paste a copy of
the getRoundedRandomNumber() function into your Solution
Document.
Also remove the line of code and associated comment you wrote
for part (ii).
2
Read the ONCLICK event handler for the file’s HTML form to
understand how getRoundedRandomNumber() is invoked and
how the returned number is displayed.
The code I have so far is below but I don't think its right please help as I need to complete this part to move onto the next. - <HTML>
-
<HEAD>
-
<TITLE>M150 TMA 5 : Programming : Task 1 - Testing Math.random()</TITLE>
-
-
<SCRIPT language = "JavaScript">
-
-
//generate a random number greater than or equal to 0.0 and less than 50.0
-
//rounded to a whole number
-
//and display it in an alert dialogue
-
-
var getRoundedRandomNumber = Math.round(Math.random()*49);
-
-
window.alert("Random number returned is: " + getRoundedRandomNumber);
-
-
-
//generate a random number and round down
-
-
var getRandomNumber = Math.floor(Math.random()*49)
-
-
</SCRIPT>
-
</HEAD>
-
<BODY>
-
<STRONG>A test of the random number functions <BR></STRONG>
-
<FORM NAME = "randomForm">
-
-
<INPUT TYPE = "button" NAME = "randomButton" VALUE ="Display Random Number!"
-
ONCLICK = "window.alert(getRandomNumber);">
-
</FORM>
-
</BODY>
-
</HTML>
9  5585  Dormilich 8,658
Recognized Expert Moderator Expert
the first thing you need is a function (see description) where you need to put in the code, so you can call it onclick.
further, your form needs an action attribute. and the script a type attribute. - <form action="name_of_page" … >
-
-
<script type="text/javascript>
Hi, any chance of an example of what function code you would use, I'm pretty useless but trying to learn lol
Dormilich 8,658
Recognized Expert Moderator Expert
the task requires you to write - function getRoundedRandomNumber(aNumber)
-
{
-
// put your code here
-
-
return roundedNumber;
-
}
and then write some code to call this function onclick.
hint: the basic idea is outlined in the task
My attempt was as follows; - Function getroundedrandomnumber(aNumber)
-
{
-
var aNumber = Math.floor(Math.random()*49);
-
-
return aNumber;
-
}
Help please lol
acoder 16,027
Recognized Expert Moderator MVP
JavaScript is case-sensitive, so make sure the case is absolutely correct and also look at the error console.
I'm typing on my iPhone in work and using notepad to right the script lol
acoder 16,027
Recognized Expert Moderator MVP
But you must be testing it in a browser, no?
Ah i see what you mean it says 'aNumber' is undefined
Thanks for the help guys I don't know how but I made it work the error console tip was great will post code when I get home, cheers again
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