PHP expm1() function

Complete PHP Math Reference

Definition and Usage

The expm1() function returns the value of E^x-1, where E is Euler's constant (approximately 2.7183) and x is the number passed to it.

Syntax

expm1(x)

Tips and Notes

Tip: E is the Euler's constant, which is the base of natural logarithms (approximately 2.7183).

Note: This function is not implemented on Windows platforms.

Example

In the following example we will use the expm1() function on different numbers:

<?php
echo(expm1(1) . "<br />");
echo(expm1(-1) . "<br />");
echo(expm1(5) . "<br />");
echo(expm1(10))
?>

Complete PHP Math Reference

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