Example 1: 
 
   > printdouble(3);
 
   0x4008000000000000
 
 
 
Example 2: 
 
   > prec=100!;
 
   > verbosity = 1!;
 
   > printdouble(exp(5));
 
   Warning: the given expression is not a constant but an expression to evaluate. A faithful evaluation will be used.
 
   Warning: rounding down occurred before printing a value as a double.
 
   0x40628d389970338f