Function: _def_realprecision
Class: default
Section: default
C-Name: sd_realprecision
Prototype:
Help:
Doc:
 \subsecidx{realprecision} : the number of significant digits and, at the same
 time, the number of printed digits of real numbers (see~\b{p}). Note that
 PARI internal precision works on a word basis (32 or 64 bits), hence may not
 coincide with the number of decimal digits you input. For instance to get 2
 decimal digits you need one word of precision which, on a 32-bit machine,
 actually gives you 9 digits ($9 < \log_{10}(2^{32}) < 10$):

 \bprog
 ? default(realprecision, 2)
       realprecision = 9 significant digits (2 digits displayed)
 @eprog

 The default value is \kbd{28}, resp.~\kbd{38} on a 32-bit, resp~.64-bit,
 machine.
