# Define an Integral on R

**URL:** https://community.freefem.org/t/define-an-integral-on-r/1609
**Category:** General Discussion
**Created:** [March 17, 2022, 1:06pm UTC](https://community.freefem.org/t/define-an-integral-on-r/1609 "2022-03-17T13:06:22Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Aicha](https://avatars.discourse-cdn.com/v4/letter/a/ec9cab/32.png) [@Aicha](https://community.freefem.org/u/Aicha)
#### Post date: [March 17, 2022, 1:06pm UTC](https://community.freefem.org/t/define-an-integral-on-r/1609/1 "2022-03-17T13:06:22Z")

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Hi,  
how we can define the function \int\_{-\infty}^{+\infty} \exp(I(t,x)) dx using FF++?

Best regards