I have a code in which calculates the Effective interest rate.
when I echo it I get 5.1161897881733 which I want to limit the remainder and output it like 5.11, is there any functions use to limit the remainder in php?
A billion ways to do this. The task for you here is to pick one.
Method 1 - round()
This will just round your number. The exact rules can be found in the PHP.net documentation.
round($someNumber, 2);
Method 2 - floor()
Floor will round the number down
floor($someNumber, 2);
Method 3 - ceil()
Opposite to floor() this will round your number upwards.
ceil($someNumber, 2);
Method 4 - number_format()
This will format any number. number_format() has a gazillion possible inputs in which you can choose decimal characters etc.
// Will round your number to 2 decimals with a . as decimal character
number_format($someNumber, 2, ",", ".");
Feel free to edit and add more options :)
round($result, 0)
The 0 represents the decimal places.
http://php.net/manual/en/function.round.php
Related
I have a variable $percentchance that represent the percent chance to succeed with something. What I would like help with is, for it to never display above 100 or below 0.
Currently I have used this min function to never go above 100.
<?php echo min(100, $percentchance); ?>
Another issue is that sometimes I get the value of percent like 26.3456, and I wish for some way to make it round up or round down and display only 2 decimals like 26.35 in that case.
You have to set an upper and lower bound for the first problem. The second problem can be tackled with number_format.
Example:
echo number_format(min(100, max(0, $x)), 2);
To enforce always rounding up to the next second digit (e.g. 1.111 would be rounded to 1.12), you could utilise ceil.
echo number_format(min(100, max(0, ceil($x*100)/100)), 2);
if you need to round up with just two decimal use round()
echo round(26.3456, 2);
Is this a bug or some math thing I don't understand?
round(58.900662, 2) => 58.9
Where is the last zero?
EDIT:
In my opinion, the documentation is lacking information.
The following code does as expected
number_format(round(58.900662, 2), 2) => 58.90
round will take care of the precision if that digit is not 0 as the last 0 has no effect in any mathematical operation.
If the number is 1.569 then round will return 1.57
If you want that 0 the you can use -
number_format(58.900662, 2, '.', ',');
number_format()
You told it to round it to the 2nd decimal place which would be 58.90. However, 58.90 can be simplified to 58.9. It is the same number.
If you want to force the display of two decimal places you can use PHP's number_format() function.
Doing an billing application in php, There come price with decimals like 0.576 tried
round()
number_format()
it will give me 0.58 but i want 0.57 only, how can i get in php?
Something like this?
floor(0.576*100)/100
//0.57
Using round with PHP_ROUND_HALF_DOWN wont work as it only affect the way decimal 5 is rounded. It does not truncate the float value.
round(0.576, 2, PHP_ROUND_HALF_DOWN);
//0.58 //Not good
round(0.575, 2, PHP_ROUND_HALF_DOWN);
//0.57 //Good but will not work above this value (e.g 0.0576, 0.0577...)
A fraction higher than .5 is always rounded up. If you already have found round why haven't you looked at the documentation:
http://www.php.net/manual/en/function.round.php
Try:
echo round( 0.676, 2, PHP_ROUND_HALF_DOWN );
I have a question regarding number formating in PHP.
I have a variable called "average", which is simply an average of a few values. To make it clear I rounded the number to 2 decimal places. Now the problem is, that if the average is for example 2.90, it only shows 2.9. Is there any way of displaying 2 decimal places always? I though I could do it by multiplying the number by 100, rounding it to zero d.p. and then divide by 100 again, but that seems a bit overcomplicated if there is an easier way of doing it.
Maybe you can try the number_format(float $number [, int $decimals = 0 ])?
For more information, take a look at http://php.net/manual/en/function.number-format.php
Format the output with printf
printf("%.1f", $num); // prints 1 decimal place
printf("%.2f", $num); // prints 2 decimal places
Is there a PHP function that will make the number always have 2 decimals places, even if it's 0?
No, but you can format a number to a string with decimals
number_format — Format a number with grouped thousands
Example:
echo number_format(0, 2); // 0.00
EDIT: the printf/sprintf solutions suggested deserve some upvotes too
Do you mean you want to print additional digits even if there's only one digit after the decimal? You can do something like:
$x = 0.1;
printf("%.2f", $x);