bcscale

Set default scale parameter for all bc math functions (PHP 4, PHP 5)
bool bcscale ( int scale )

Example 342. bcscale() example

<?php

// default scale : 3
bcscale(3);

echo bcdiv('105', '6.55957'); // 16.007


// this is the same without bcscale()
echo bcdiv('105', '6.55957', 3); // 16.007

?>

Code Examples / Notes » bcscale

If you don't set the default scale, be careful when you're chaining together several BC math functions - since by default, these functions will round off your values, losing accuracy very quickly: <?php $a = 1.234 $b = 2.345 $c = 7.890 $ab = bcmul($a,$b); // 2 $abc = bcmul($ab,$c); echo $abc; // 15 ?> ... compare with the answer you get when you use more decimal places: <?php $a = 1.234 $b = 2.345 $c = 7.890 bcscale(15); $ab = bcmul($a,$b); // 2.893730 $abc = bcmul($ab,$c); echo $abc; // 22.83152970 ?>

bcscale

Set default scale parameter for all bc math functions (PHP 4, PHP 5) bool bcscale ( int scale )

Example 342. bcscale() example

Code Examples / Notes » bcscale

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Set default scale parameter for all bc math functions (PHP 4, PHP 5)
bool bcscale ( int scale )