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currency convertor

 
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Hi there,
I'm a complete novice on javascript and am trying to make a basic currency convertor as part of my college course.
I have the beginning sorted, but am struggling to get the code to output the answer.

Can any kind soul tell me where I'm going wrong?

// Aim; to imput an amount in £'s and output in $'s using an exchange rate of 1.78 //

var amountInPounds, amountInDollars, dollarRate;

document.write('Currency Conversion Application A' + '<BR><BR>');

dollarRate = 1.78;


amountInPounds = window.prompt('PLease enter your sterling amount' ,'');
amountinPounds = parsefloat(amountinPounds);
amountInDollars = amountinPounds * dollarRate;
amountinDollars = parsefloat(amountinDollars);
document.write('total is ' + amountinDollars + '<br>');

Any help gratefully appreciated!

Phil

 
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var amountInPounds, amountInDollars, dollarRate;
amountinPounds = parsefloat(amountinPounds);
amountInDollars = amountinPounds * dollarRate;
amountinDollars = parsefloat(amountinDollars);
document.write('total is ' + amountinDollars + '<br>');

Hello Mr. Woo.

I would just like to bring to your attention the suspect:) lines of code above. (Very simple but effective logic by the way! :cool: ) Keep in mind that Javascript is case sensitive so parseFloat() and parsefloat() are two different animals.:) As is the case with 'amountinPounds' and 'amountInPounds'.

Here is the corrected code back-at-ya:

var amountInPounds, amountInDollars, dollarRate;

document.write('Currency Conversion Application A' + '<BR><BR>');

dollarRate = 1.78;
amountInPounds = window.prompt('PLease enter your sterling amount' ,'');
amountInPounds = parseFloat(amountInPounds);
amountInDollars = amountInPounds * dollarRate;
amountInDollars = parseFloat(amountInDollars);
document.write('total is ' + amountInDollars + '<br>');
 
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Many thanks for the reply!
With your help I'm getting the hang of it slowly as well as trying to be more precise with the spelling etc

best wishes

 
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Well I'm back again after hitting another stumbling block.
This time I'm trying to input 4 values which the program will display before outputting as a total.

So far I have managed to get it to prompt for & display the values, but instead of giving a total it displays each individual value.

I'm close, but can't see the error.......any idea's ??

<HTML>
<HEAD>
<TITLE>Electric Bills
</TITLE>
<SCRIPT >

/* Program to read in a known number of data items and store them in an array */

var paymentArray = new Array (4);
var total;

document.write('Array program to display a customers four quarterly bills to an Electricity company & show the total due');

total = 0

for (var quarter = 0; quarter < paymentArray.length; quarter = quarter + 1)
{
    paymentArray[quarter] = window.prompt('Enter payment value','')

}; 
document.write('<BR>' + '<BR>');
document.write('Confirmation of amounts payable' + '<BR>' + '<BR>');


for (var quarter = 0; quarter < paymentArray.length; quarter = quarter + 1)
{
    document.write(paymentArray[quarter] + '<BR>')

    total = total + paymentArray[quarter]
    total = parseFloat(total)    
}
document.write('total amount paid is ' + total + '<br>')

</SCRIPT>
</HEAD>
<BODY>
</BODY>
</HTML>
 
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I'm close, but can't see the error.......any idea's ??

Boy do I know how you feel :!: You were very close! Remember this about Javascript code: the '+' operator acts as both an agent to add numbers and concatenate strings. ;) The latter, concatenation of strings, is what was happening in your code. Notice the two changes that I made to make it work:

/* Program to read in a known number of data items and store them in an array */

var paymentArray = new Array (4);
var total = new Number;

document.write('Array program to display a customers four quarterly bills to an Electricity company & show the total due');

total = 0

for (var quarter = 0; quarter < paymentArray.length; quarter = quarter + 1)
{
paymentArray[quarter] = window.prompt('Enter payment value','')

}; 
document.write('<BR>' + '<BR>');
document.write('Confirmation of amounts payable' + '<BR>' + '<BR>');


for (var quarter = 0; quarter < paymentArray.length; quarter = quarter + 1)
{
document.write(paymentArray[quarter] + '<BR>')

total = total + Number(paymentArray[quarter])
total = parseFloat(total) 
}
document.write('total amount paid is ' + total + '<br>')

You are definitely well on your way. :)

 
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Many thanks.
It really is tricky, even when I copied the changes over I wrote 'number' with a small 'n' and it had a wobbly, I wish it wasn't so case sensitive!

I'm working on a Function Library now and some string things so watch this space....something tells me ....... 'I'll be back' :lol:

 
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Well, as expected I'm back...the only surprise is it took me so long!

I'm trying to make a little program which takes a string, doubles any vowels, returning the string with all the vowels doubled in an alert box.
Sadly it has me baffled........

The program is supposed to make use of a function called 'doublevowels' that I made earlier (although I am rather dubious whether that is correct as well!) & imports it from a function library.

So here's where I'm at;

<HTML>
<HEAD>
<TITLE>vowels
</TITLE>
<SCRIPT SRC = "stringLibrary.js"> </SCRIPT>
<SCRIPT >


Function doublevowels(aString)
var answer;


answer = '';


for (var position = 0; position < aString.length; position = position +1)
{
(doublevowels('string goes here'))
}


return answer
window.confirm(+ answer + '<br>')



</SCRIPT>
</HEAD>
<BODY>
</BODY>
</HTML>

Any pointers about what else I need and where will be gratefully appreciated!

 
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All sorted! :cheesy:

 
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All sorted! :cheesy:

I'm glad you've done it!! Sorry I didn't have time to assist this time. :sad:

However, it seems as though you have graduated! :cool:

 
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All sorted! :cheesy:

perhaps Mr Woo u would be so kind as to share as to how you got it sorted :)

 
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wish i had thought to ask the answers to my open uni m150 tma in here

 
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wish i had thought to ask the answers to my open uni m150 tma in here

Well like me it feels a million times better to actually get it done by yourself plus tutors arent stupid I`m sure they are fully aware of forums like these so not worth the risk.
Interesting tho

You
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