What is float

Answer 1

That depends on the context. Please tag the relevant programming language.
In case you mean data types, float is a floating point number

Answer 2

I believe it is what we call soda with icecream in it

Answer 3

a float is a decimal number like 3.4 as opposed to an integer like 3. in computing they were named floating point numbers for the way to store them. The decimal point would not occupy a fixed position allowing to store small numbers with more figures after the point than large numbers. This would enhance precision.