FAQ: Variables: Lesson - Float and Double, What's the Difference?

This community-built FAQ covers the “Float and Double, What’s the Difference?” exercise from the lesson “Variables: Lesson”.

Paths and Courses
This exercise can be found in the following Codecademy content:

Learn C

FAQs on the exercise Float and Double, What’s the Difference?

There are currently no frequently asked questions associated with this exercise – that’s where you come in! You can contribute to this section by offering your own questions, answers, or clarifications on this exercise. Ask or answer a question by clicking reply (reply) below.

If you’ve had an “aha” moment about the concepts, formatting, syntax, or anything else with this exercise, consider sharing those insights! Teaching others and answering their questions is one of the best ways to learn and stay sharp.

Join the Discussion. Help a fellow learner on their journey.

Ask or answer a question about this exercise by clicking reply (reply) below!
You can also find further discussion and get answers to your questions over in #get-help.

Agree with a comment or answer? Like (like) to up-vote the contribution!

Need broader help or resources? Head to #get-help and #community:tips-and-resources. If you are wanting feedback or inspiration for a project, check out #project.

Looking for motivation to keep learning? Join our wider discussions in #community

Learn more about how to use this guide.

Found a bug? Report it online, or post in #community:Codecademy-Bug-Reporting

Have a question about your account or billing? Reach out to our customer support team!

None of the above? Find out where to ask other questions here!

I’ve been under the impression that since float and double both utilize floating-point arithmetic, it should not be used for things that require extreme mathematical precision, such as in finance. For example, one would use BigDecimal instead of double for Java. Is this still the case in C?

I suppose it depends on exactly what you’re doing but if the accuracy was important enough to have an effect in Java then the same issues would persist in C for sure. I don’t think there’s a built-in option like that for C, you’d probably have to look for a library for it, e.g. List of arbitrary-precision arithmetic software - Wikipedia but I’d happily be proven wrong if I’ve overlooked one.

For anyone who’s unfamiliar with the potential issues of using floating point the link below discusses it briefly but you’ll find plenty of guidance with a quick web search-

1 Like