What is a Float and a Double?

Answer 1

A float is a data type.
A float is divided into 3:
1. float // 4 bytes long
2. double // 8 bytes long
3. long float // 10 bytes long

In sequence succession 1 2 3 each has increased capability of storing more numbers.

Answer 2

float and double are data types like int.
they can store decimal values.
they have a range bigger than int data type.