What do they mean by "floating point number"

Answer 1

a floating point a.k.a decimal
3.2 is a floating point number.
4.5,6.2,1.1 are all floats.
any number you see an x.y is a float

Answer 2

Jamie understood, Thanks so much, ᠌᠌brains thanks also

Answer 3

And im guessing double is basically two decimal places in? thanks by the way.