abs
(PHP 3, PHP 4 )
abs -- Absolute value
Description
number abs ( mixed number)
Returns the absolute value of number. If the argument number
is of type float, the return type is also float, otherwise
it is integer (as float usually has a bigger value range
than integer).
Example 1. abs() example
<?php
$abs = abs(-4.2); // $abs = 4.2; (double/float)
$abs2 = abs(5); // $abs2 = 5; (integer)
$abs3 = abs(-5); // $abs3 = 5; (integer)
?>
acos
(PHP 3, PHP 4 )
acos -- Arc cosine
Description
float acos ( float arg)
Returns the arc cosine of arg in radians. acos() is the
complementary function of cos(), which means that a==cos(acos(a))
for every value of a that is within acos()' range.
See also: acosh(), asin(), and atan().
|
