# Let syntax error

**URL:** <https://discourse.processing.org/t/let-syntax-error/32662>\
**Category:** Beginners\
**Created:** [October 7, 2021, 1:02am UTC](https://discourse.processing.org/t/let-syntax-error/32662 "2021-10-07T01:02:39Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Arche](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/arche/32/14641_2.png) [@Arche](https://discourse.processing.org/u/Arche)\
**Post date:** [October 7, 2021, 1:02am UTC](https://discourse.processing.org/t/let-syntax-error/32662/1 "2021-10-07T01:02:39Z")

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I am new to processing and java and was trying to use let but when I compile it says syntax error. Do I have to add a plugin for that and how do I do it?

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**Author:** ![TfGuy44](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/tfguy44/32/41_2.png) [@TfGuy44](https://discourse.processing.org/u/TfGuy44)\
**Post date:** [October 7, 2021, 3:34am UTC](https://discourse.processing.org/t/let-syntax-error/32662/2 "2021-10-07T03:34:35Z")

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Processing is it’s own language, with it’s own syntax. Unlike pure JavaScript, it doesn’t use “let” as a key word.

In fact, Processing is a typed language, meaning that variables can only be assigned an object of the right kind.

Try one of these keywords instead: [https://processing.org/reference/#data](https://processing.org/reference/#data)