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*View this file with results and syntax highlighting [here](https://mlochbaum.github.io/BQN/help/currentfunction.html).*
# Mathematical Double-struck S (`π`)
## `π`: Current Function
A variable assigned to the current function block. `π€` accesses the same value but has a subject role.
`π` can be used for recursion.
F β {π 0: 1; π© Γ π π©-1} # Factorial
F 5
{π€βΏπ€}4
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