# Help please,need FreeFem++ code

**URL:** <https://community.freefem.org/t/help-please-need-freefem-code/3418>\
**Category:** Feature Request\
**Created:** [July 29, 2024, 1:15pm UTC](https://community.freefem.org/t/help-please-need-freefem-code/3418 "2024-07-29T13:15:39Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Monirul25](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.freefem.org/monirul25/32/3287_2.png) [@Monirul25](https://community.freefem.org/u/Monirul25)\
**Post date:** [July 29, 2024, 1:15pm UTC](https://community.freefem.org/t/help-please-need-freefem-code/3418/1 "2024-07-29T13:15:39Z")

</div>

**r is a random number uniformly distributed on [-0.005; 0.005].**  
**what i write the code of r in FreeFem++.**  
Suppose u=r  
Then, what will be w=u^3-u-((\nabla^2 )u);  
=u^3-u-\Delta u

Please help.  
**I need FreeFem++ code of u=r and w.**