When Would You Use a Float Data Type?

Integers and floats are two different kinds of numerical data. An integer (more commonly called an int) is a number without a decimal point. A float is a floating-point number, which means it is a number that has a decimal place. Floats are used when more precision is needed.

When would you use float instead of doubles?

double has higher precision, whereas floats take up less memory and are faster. In general you should use float unless you have a case where it isn't accurate enough. On typical modern computers, double is just as fast as float.

What is floating-point good for?

A floating-point system can be used to represent, with a fixed number of digits, numbers of different orders of magnitude: e.g. the distance between galaxies or the diameter of an atomic nucleus can be expressed with the same unit of length.