Can someone explain me double? I dont understand it

Question

Can someone explain me double? I dont understand it
how to use double in c++

Answer 1

double (as I know it) means a intreger that can be like 3.304 and have numbers after a dot (very usefull in challenges where you have to look at the decimals

Answer 2

It stores decimal numbers more precise than a float

Answer 3

it takes decimal numbers.
such as
double x = 4.45
😉

Answer 4

we can use float instead of double even float stores decimal values?