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BCMath Arbitrary Precision Mathematics Functions
PHP Manual
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IV. BCMath Arbitrary Precision Mathematics Functions

In PHP 4, these functions are only available if PHP was configured with --enable-bcmath. In PHP 3, these functions are only available if PHP was not configured with --disable-bcmath.

Note: Due to changes in the licensing, the BCMATH library is distributed separate from the standard PHP source distribution. You can download the tar-gzipped archive at the url: http://www.php.net/extra/number4.tar.gz. Read the file README.BCMATH in the PHP distribution for more information.

Table of Contents
bcadd -- Add two arbitrary precision numbers
bccomp -- Compare two arbitrary precision numbers
bcdiv -- Divide two arbitrary precision numbers
bcmod --  Get modulus of an arbitrary precision number
bcmul -- Multiply two arbitrary precision number
bcpow --  Raise an arbitrary precision number to another
bcscale --  Set default scale parameter for all bc math functions
bcsqrt --  Get the square root of an arbitrary precision number
bcsub --  Subtract one arbitrary precision number from another
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