# \[\]\[\] ,What does that symbol mean?

**URL:** <https://discourse.processing.org/t/what-does-that-symbol-mean/8860>\
**Category:** Beginners\
**Created:** [March 2, 2019, 1:32pm UTC](https://discourse.processing.org/t/what-does-that-symbol-mean/8860 "2019-03-02T13:32:57Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ximi](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/ximi/32/3939_2.png) [@ximi](https://discourse.processing.org/u/ximi)\
**Post date:** [March 2, 2019, 1:32pm UTC](https://discourse.processing.org/t/what-does-that-symbol-mean/8860/1 "2019-03-02T13:32:57Z")

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if (m[x/sTile][y/sTile] == 0) fill(c0);

in the code above,[][] means m[]\*m[] ?

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**Author:** ![GoToLoop](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/gotoloop/32/86_2.png) [@GoToLoop](https://discourse.processing.org/u/GoToLoop)\
**Post date:** [March 2, 2019, 1:39pm UTC](https://discourse.processing.org/t/what-does-that-symbol-mean/8860/2 "2019-03-02T13:39:35Z")

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[Processing.org/reference/arrayaccess.html](http://Processing.org/reference/arrayaccess.html)  
[Processing.org/examples/array2d.html](http://Processing.org/examples/array2d.html)

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<div class="post-metadata">

**Author:** ![ximi](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/ximi/32/3939_2.png) [@ximi](https://discourse.processing.org/u/ximi)\
**Post date:** [March 2, 2019, 2:18pm UTC](https://discourse.processing.org/t/what-does-that-symbol-mean/8860/3 "2019-03-02T14:18:11Z")

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Thanks for your reply! i solved my problem.  
And i find this [https://processing.org/tutorials/2darray/](https://processing.org/tutorials/2darray/) is better to understand the problem relates to 2D array.