[SOLVED] Round to 4 decimal help

[phpbeginner]

Trying to round math to 4 decimal places but cuts of if it ends in 0's. For example want to display 1.9800 but displays as 1.98

 

Here is my round code

 

$subtotal = ROUND ('1.0000' * ($row[2] + $row[3] + $row[4]), 4) ;

[discomatt]

you want sprintf()

 

<pre><?php

$num = 12345.12;

echo sprintf('%.4f', $num );

?></pre>

[F1Fan]

What's wrong with number_format()?

[.josh]

what's wrong with sprintf()?

[discomatt]

Beat me to it

[F1Fan]

I guess it's personal preference. However, sprintf is for strings and number_format is for numbers, so to me it makes more sense to "format a number" using the function that is designed to format numbers, rather than strings. Again, maybe it's just me. There's nothing "wrong" with sprintf, especially if you're used to using it more. I almost never use sprintf, because I mostly format numbers, so number_format is what I know.

[phpbeginner]

You lost me with sprintf.......so can anyone help me or know why my code is not working? Thanks In Advance.

 

$subtotal = ROUND ('1.0000' * ($row[2] + $row[3] + $row[4]), 4) ;

[F1Fan]

This will give you what you want:

 

<?php
$subtotal = number_format(($row[2] + $row[3] + $row[4]), 4, '.', '');
?>

[discomatt]

You lost me with sprintf.......so can anyone help me or know why my code is not working? Thanks In Advance.

 

We did help you. I even gave you a working example....

 

 

 

I'm not going to code for you.

[Mchl]

It's not working, because round() function returns a float number. Whenever you echo a float, any zeroes at the end are omitted.

To echo float with exactly 4 places after a decimal separator you need to use one of the functions that will convert it to string.

This can be either

$n = sprintf('%.4f', $yourNumber );

 

or

 

$n = number_format($yourNumber,4);

 

[phpbeginner]

Thanks so much for your help! Worked fine. Cheers