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PHP Quiz PHP CertificatePHP log10() Function
Complete PHP Math Reference
Definition and Usage
The log10() function returns the base-10 logarithm of a number.
Syntax
log10(x)
| Parameter | Description |
|---|---|
| x | Required. A number |
Tips and Notes
Note: If the parameter x is negative, -1.#IND is returned.
Example
In the following example we will use the log10() function on different numbers:
<?php
echo(log10(2.7183) . "<br />");
echo(log10(2) . "<br />");
echo(log10(1) . "<br />");
echo(log10(0) . "<br />");
echo(log10(-1))
?>
echo(log10(2.7183) . "<br />");
echo(log10(2) . "<br />");
echo(log10(1) . "<br />");
echo(log10(0) . "<br />");
echo(log10(-1))
?>
The output of the code above will be:
0.434297385125
0.301029995664
0
-1.#INF
-1.#IND
0.301029995664
0
-1.#INF
-1.#IND
Complete PHP Math Reference
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