PHP log1p() Function
Definition
The log1p() function returns log(1+number), computed in a way that is accurate even when the value of number is close to zero.
Syntax
PHP log1p() Function has the following syntax.
log1p(number);Parameter
| Parameter | Is Required | Description |
|---|---|---|
| number | Required. | Number to process |
Return
| Item | Description |
|---|---|
| Return Value | log(1+number) |
| Return Type | Float |
Example
Return log(1+number) for different numbers:
<?php/*from w w w .j a v a 2s . co m*/
echo(log1p(2.7183) . "\n");
echo(log1p(2) . "\n");
echo(log1p(1) . "\n");
echo(log1p(0));
?>
The code above generates the following result.
