Double-precision floating point numbers are also
numbers with a decimal point. We know that the float type can take large
floating point numbers with a small degree of precision but the double-precision
double type can hold even larger numbers with a higher degree of precision.
The sizes of the double types are as follows.
doubleprecision 8 IE-38 to IE+38 with 10 digit of precision
long double 8 IE-38 to IE+38 with 10 digit of precision