Long / Extended Double Precision Floating Point Data Type
How is "long double" datatype used in C++?.
The "Long Double" or "Extended Double" data type
is used to represent floating point numbers that occupies 8 bytes. This extented precision datatype is more precise than the "double" datatype. The range of values for the datatype is between +/- 1.7e and +/- 308.
double l = 1000000000.0;
cout << "Long double floating number is:" << l << '\n';
cout << "The bytes occupied is:" << sizeof(l);
Extended Double precision floating number is: 1e+09
The bytes occupied is: 8
In the above example the value of the long double floating point precision number is displayed along with the bytes occupied by the "long double" datatype.