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PHP log() - Math Functions
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Tutorials » Php »
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Topic |
What is log Function?
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Explanation |
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The "log()" function returns the natural logarithm of a number.
Syntax:
log(x,base)
In the above syntax "x" is the number for which to find the natural logarithm, "base" is an optional value.
Example:>
<?php
echo(log(2.7183)."<br />");
echo(log(-1));
?>
Result:
1.00000668491
NAN
In the above example the negative value returns NAN value.
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A Note |
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