What is a double variable

Answer 1

Double is a data type for decimal numbers.

Example:
double PI = 3.14159265359;

Answer 2

cananyone give me an example?

Answer 3

Double variable is one of the fundamental C++ datatype that can store very large data and occupies 8 bytes in the memory

Answer 4

Thanks guys

Answer 5

what is std

Answer 6

It's a data type to represent floating point numbers with “double“ precision relative to float. Float uses 32 bit to represent numbers, double uses 64 bit. You might be interested in looking up their data ranges and how the numbers are represented in memory.

Answer 7

double mobile=9876543210;