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# XXVIII. Mathematical functions

# Introduction

These math functions will only handle values within the range of the long and double types on your computer. If you need to handle bigger numbers, take a look at the arbitrary precision math functions.

## Math constants

The following values are defined as constants in PHP by the math extension:

Table 1. Math constants

Constant | Value | Description
--- | --- | ---
M_PI | 3.14159265358979323846 | The value of ¶ (pi)

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