what am I doing wrong??

**student32** · Oct 28th, 2002, 05:15 PM

PLEASE HELP ME!!! otherwise I will have a nervous breakdown, I'm learning javasript(very new to this)and have been ask to write a code to work out simple interest rate. here is my feeble attempt at it;<html>
<head>
<title> Headwreaker</title>

<script type = "text/javascript">
<!--
var Name, // first string entered by user
Address, // second string entered by user
DOB, // Date of Birth
Occupation, // job
p, //Amount entered by user
n, //How long the loan is for in years
i, // interest
fixedInterest,
amount,
years,
firstno,
secno,

// read in name from user as a string
Name =
window.prompt( "Enter name", "" );

// read in address from user as a string
Address =
window.prompt( "Enter address", "" );

// read in DOB from user as a string
DOB =
window.prompt( "Enter DOB", "" );

// read in Occupation from user as a string
Occupation =
window.prompt( "Enter Occupation", "" );

// read in Amount from user as a string
p=
window.prompt( "Enter the amount of loan ", "0" );

// read in Period from user as a string
n=
window.prompt( "Enter the loan in years", "0" );

// convert numbers from strings to integers
p = parseFloat(firstno);
n = parseFloat(secno);

// Simple intrest
// Formula i = interest P amount n No of years
// A = amount after No of years

sum = Math.(p*(1+n*i));

//function to calculate Fixed interest
//function Interest()
//var i=0.088;
//var fixedInterest=P*(1)+(n);

document.write("sum",+ sum);

</script>
</head>
<body>
<p>Click Refresh (or Reload) to run the script again</p>
</body>
</html>

It would be much appericated otherwise I'll have to phone the samatrians!!!

Thanx Lisa

**MrPresident2k** · Oct 29th, 2002, 01:58 AM

Hi,
Try with this.

Code:

<html>
<head>
<title> 
Headwreaker
</title>
<head>
<body>
<script Language = "javascript">
	var Name, // first string entered by user
	Address, // second string entered by user
	DOB, // Date of Birth 
	Occupation, // job
	p, //Amount entered by user
	n, //How long the loan is for in years
	i, // interest
	fixedInterest,
	amount,
	years, 
	firstno,
	secno;
	// read in name from user as a string
	Name = window.prompt( "Enter name", "" );

	// read in address from user as a string
	Address = window.prompt( "Enter address", "" );

	// read in DOB from user as a string
	DOB = window.prompt( "Enter DOB", "" );

	// read in Occupation from user as a string
	Occupation = window.prompt( "Enter Occupation", "" );


	// read in Amount from user as a string
	p= window.prompt( "Enter the amount of loan ", "0" );

	// read in Period from user as a string
	n= window.prompt( "Enter the loan in years", "0" );

	// convert numbers from strings to integers
	p = parseFloat(p); 
	n = parseFloat(n);
	var i=0.088;
	
	// Simple intrest 
	// Formula i = interest P amount n No of years 
	// A = amount after No of years

	sum = eval(p*(1+n*i));

	//function to calculate Fixed interest 
	//function Interest()
	//var i=0.088;
	//var fixedInterest=P*(1)+(n);
	document.write("sum = " + sum);
</script>
<br><br>
<p>
Click Refresh (or Reload) to run the script again</p>
</body>
</html>

Good Luck,
Pres.

**student32** · Oct 29th, 2002, 04:32 AM

thanx for replying Pres
I'll try that now and get back to you a little later it's much appericated.

Lisa

**CornedBee** · Oct 29th, 2002, 03:49 PM

Why do you use eval?
sum = p*(1+n*i);
Assuming the formula is correct, this would work too.

**MrPresident2k** · Oct 29th, 2002, 11:24 PM

Yea,

We can do that, since we are using parseInt. Thats just for a safety
;-)

Thanks,
Pres.

**CornedBee** · Oct 30th, 2002, 10:47 AM

That's the thing I hate most about JavaScript. Using + for both concatenation and addition in a non-typed language is madness!

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