Double precision floating point number means

Answer 1

having double precision in floating point means that you can represent a floating point number with more number after comma.. to understand that better, you should knom about floating point number representation on a computer, if you want to learn more about, search for ieee754 on the internet

Answer 2

Double-precision floating-point format is a computer number format that occupies 8 bytes (64 bits) in computer memory and represents a wide, dynamic range of values by using a floating point.