> For the complete documentation index, see [llms.txt](https://astro-rpa.gitbook.io/astro-rpa-user-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://astro-rpa.gitbook.io/astro-rpa-user-guide/g_elements/el_basic/flow_control/el_logic_while.md).

# While

![](/files/KnUoTSUk17DfUCUkiosC)

Component-cycle that continues until the expression set in it returns the Truth (at the end of the cycle)

![](/files/AFXi7zdnynOLkbrPmxqb)

Properties

\- Expression\*: \[Boolean] Expression the truth of which is checked before each iteration of the cycle