I think it should depend on the underlying architecture, on how it stores
the floating data types

In case floats and double are implemented using IEEE 754, then floats have 8
bits for precision and double have 11 bits for precision. Normally the
exponents are biased, which means that for float it ranges from 2^(-127) to
2^(+ 127) and for double it ranges from 2^(-1024) to 2^(+1024).

~Himanshu Aggarwal

On Tue, Apr 13, 2010 at 6:10 AM, Anil C R <cr.a...@gmail.com> wrote:

> correct me if I'm wrong but, float has a precision of around 8 digits. and
> double 16 digits... if you want arbitrary precision floating point numbers,
> try GNU BigNum library...
> Anil
>
>
> On Mon, Apr 12, 2010 at 9:54 PM, Himanshu Aggarwal <
> lkml.himan...@gmail.com> wrote:
>
>>
>>
>> On Sun, Apr 11, 2010 at 6:55 PM, GentLeBoY <vikrantsing...@gmail.com>wrote:
>>
>>> how to store fractional numbers with a fractional part having 25-30
>>> digits after decimal place,
>>> does long double has the same precision as double?.
>>> 1 more prob.
>>> format specifier for long double is %lf and same for double, so if i
>>> write
>>>       long double a;
>>>       scanf("%lf",&a);
>>>       a=a*2;
>>>       printf("%lf",a);
>>> why is the output -2.0000  ?
>>>
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>>
>> Float has single precision.
>> double has double precision.
>> Long double has extended precision.
>>
>> For your requirement, even a float would suffice. check out the value of
>> FLT_MAX . It is of the order of 10^37.
>>
>> ~Himanshu Aggarwal
>>
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