FAQ: Learn Java: Variables - doubles

This community-built FAQ covers the “doubles” exercise from the lesson “Learn Java: Variables”.

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This exercise can be found in the following Codecademy content:

Learn Java

FAQs on the exercise doubles

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Is the ‘double’ datatype in java similar to the ‘float’ datatype in python?

Why do I need int? Can I just store everything in double?

I’m not an expert in Java but I’m learning. However, I think as with most things in Java, there are multiple ways to get the same answer, it just seems cleaner to write int a = 1; rather double a = 1;

However, I’m sure there is a specific reason why you would have to use an int over a double at some point. I believe double cannot be negative either.

Hope that helps.

I’ve just read that using “double” takes up more memory than using “int”. Memory isn’t important me at this early stage but maybe later on it becomes relevant.