# FAQ: Variables - Type

This community-built FAQ covers the “Type” exercise from the lesson “Variables”.

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

## FAQs on the exercise Type

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 () 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.

You can also find further discussion and get answers to your questions over in #get-help.

Agree with a comment or answer? 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

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!

so im learning swift and i had to Declare a `Double` variable named `tempf` and initialize it with the temperature.

Declare another `Double` variable named `tempc` .

i have had problems before where i type the right code and it says its incorrect but gives no error but this time its giving me a error, i dont see how my code it wrong
`var tempf: double = 84.0 var tempc: double = 9.0`
and its giving me this error,
“Temperature.swift:2:12: error: use of undeclared type ‘double’
var tempf: double = 84.0”

Capitalise ‘Double’ because it is a type.

1 Like