Ok, nevermind about that. I fixed it finally. However, I am having trouble
with the negative exponents. I want to find the scientific notation of
0.0046 which should be 4.6 * 10 to the negative 3rd. However, what I get in
return is this:
4.6E-009 * 106
How could I fix this problem? I'm also having it for getting the standard
form of 1.7 * 10 to the negative 6th. I get this: 1.7E-006
Here's my code for finding the scientific notation:
$num = $_POST['num'];
$pos[0] = strpos($num, "1");
$pos[1] = strpos($num, "2");
$pos[2] = strpos($num, "3");
$pos[3] = strpos($num, "4");
$pos[4] = strpos($num, "5");
$pos[5] = strpos($num, "6");
$pos[6] = strpos($num, "7");
$pos[7] = strpos($num, "8");
$pos[8] = strpos($num, "9");
array_multisort($pos, SORT_DESC);
$exp = 0;
$position = $pos[0] + 1;
do {
$num /= 10;
$exp++;
} while($exp < $position);
$output = $num . " * 10<sup>".$exp."</sup>";
echo $output;
Here's the code for finding the standard form:
$num = $_POST['num'];
$exp = $_POST['power'];
$output = $num * pow(10, $exp);
Please help me! I'm lost!!
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