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Views: 7499 | Replies: 11
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Join Date: Jan 2005
Posts: 6
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Newbie Poster
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
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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Join Date: Dec 2004
Location: Washington DC
Posts: 10
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Rep Power: 4
Solved Threads: 1
Newbie Poster
Re: currency convertor •
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Originally Posted by mr woo
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! 
) 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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Join Date: Jan 2005
Posts: 6
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Newbie Poster
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
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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Join Date: Jan 2005
Posts: 6
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Newbie Poster
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>
...............................................................................
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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Join Date: Dec 2004
Location: Washington DC
Posts: 10
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Rep Power: 4
Solved Threads: 1
Newbie Poster
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Originally Posted by mr woo
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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Join Date: Jan 2005
Posts: 6
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Newbie Poster
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:
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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Join Date: Mar 2005
Posts: 1
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Newbie Poster
wish i had thought to ask the answers to my open uni m150 tma in here
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Join Date: Feb 2005
Location: Essex
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Newbie Poster
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Originally Posted by fatkid
wish i had thought to ask the answers to my open uni m150 tma in here
Interesting tho
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