double                   Double-Precision Floating-Point Data Type
 
    The double type declares an object to be of "double-precision"
    floating-point type.  The size (and representation) of a double
    object is implementation-defined.  A double is the same or greater in
    size than a float.
 
      Notes:    In Turbo C, the size of a double object is eight bytes.
                The range of values is approximately 1.7E-308 to
                1.7E+308.
 
                All floating constants have type double. You can coerce a
                floating constant to type float by adding an `F' suffix
                to the constant.
 
                The decision between using double and float is one of
                space versus run-time conversion cost.
 
                In Turbo C, both doubles and long doubles are eight
                bytes.
 
  -------------------------------- Example ---------------------------------
 
           double value = 1.234;
           double d1 = 1.234E-24;
 
           value = (double) 123;

Seealso:


 float 
 long