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PHP Manual [bcsqrt]

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PHP Manual || BC Math Functions

(PHP 4, PHP 5, PHP 7)

bcsqrtGet the square root of an arbitrary precision number


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

Return the square root of the operand.



The operand, as a string.


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.


Example #1 bcsqrt() example


echo bcsqrt('2'3); // 1.414


See Also

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

PHP Manual || BC Math Functions