note 78998 added to function.round

smithaapc's trueRound() function is also broken. For example: trueRound(1.11, 3) //returns 1.1, should return 1.11 Here's a function that uses PHP's round() to calculate significant figures: <?php function sigFig($value, $sigFigs) { $exponent = floor(log10($value) + 1); $significand = $value / pow(10, $exponent); $significand = round($significand * pow(10, $sigFigs)) / pow(10, $sigFigs); $value = $significand * pow(10, $exponent); return($value); } //Examples sigFig(123.45, 6); // 123.45 (doesn't pad with zeros) sigFig(123.45, 5); // 123.45 sigFig(123.45, 4); // 123.5 sigFig(123.45, 3); // 123 sigFig(123.45, 2); // 120 (rounds to 2 figures) sigFig(123.45, 1); // 100 sigFig(123.45, 0); // 0 (!) ?> ---- Server IP: 87.124.64.96 Probable Submitter: 84.93.218.9 ---- Manual Page -- http://www.php.net/manual/en/function.round.php Edit -- https://master.php.net/note/edit/78998 Del: integrated -- https://master.php.net/note/delete/78998/integrated Del: useless -- https://master.php.net/note/delete/78998/useless Del: bad code -- https://master.php.net/note/delete/78998/bad+code Del: spam -- https://master.php.net/note/delete/78998/spam Del: non-english -- https://master.php.net/note/delete/78998/non-english Del: in docs -- https://master.php.net/note/delete/78998/in+docs Del: other reasons-- https://master.php.net/note/delete/78998 Reject -- https://master.php.net/note/reject/78998 Search -- https://master.php.net/manage/user-notes.php