PHP 7.0.6 Released

    bcsqrt

    (PHP 4, PHP 5, PHP 7)

    bcsqrt — Get the square root of an arbitrary precision number

    Description

    string bcsqrt ( string $operand [, int $scale = 0 ] )

    Return the square root of the operand.

    Parameters

    operand

    The operand, as a string.

    scale

    This optional parameter is used to set the number of digits after the decimal place in the result. If omitted, it will default to the scale set globally with the bcscale() function, or fallback to 0 if this has not been set.

    Return Values

    Returns the square root as a string, or NULL if operand is negative.

    Examples

    Example #1 bcsqrt() example

    <?php

    echo bcsqrt('2', 3); // 1.414

    ?>

    See Also

    • bcpow() - Raise an arbitrary precision number to another

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