'big square root' for BigDecimal

[Jeremy Watts]

hi,

is there a 'big square root' feature to find square roots of BigDecimal
numbers?


thanks

 

[Roland]

hi,

is there a 'big square root' feature to find square roots of BigDecimal
numbers?


thanks

Since BigDecimal doesn't seem to provide a sqrt method (neither
pow(0.5)), you'll have to implement it yourself
<http://en.wikipedia.org/wiki/Square_root#Computing_square_roots>
or use Google to find an implementation
<http://www.google.com/search?hl=en&q=BigDecimal+"square+root">
--
Regards,

Roland de Ruiter
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[klynn47]

Are you familiar with the Newton-Raphson Method?

 

[Jeremy Watts]

Are you familiar with the Newton-Raphson Method?

yes its not the implementation thats a problem - just didnt want to waste
effort writing a routine, if indeed a method did exist.

and yes i am familiar with newton-raphson and is indeed the method i intend
to use

thanks

 

[Boudewijn Dijkstra]

yes its not the implementation thats a problem - just didnt want to waste
effort writing a routine, if indeed a method did exist.

and yes i am familiar with newton-raphson and is indeed the method i intend
to use

In that case you already realised that the result of the doubleValue() method
is an excellent starting guess for the algorithm.