Description
mixed
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).
範例 1. abs()
example
$abs = abs(-4.2); // $abs = 4.2; (double/float)
$abs2 = abs(5); // $abs2 = 5; (integer)
$abs3 = abs(-5); // $abs3 = 5; (integer)
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