help/undo.md


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*View this file with results and syntax highlighting [here](https://mlochbaum.github.io/BQN/help/undo.html).*

# Superscript Equals Sign (`⁼`)

## `𝔽⁼ 𝕩`, `𝕨 𝔽⁼ 𝕩`: Undo

Invert the function `𝔽`, or use its defined inverse. Not all functions have inverses.


           1 - 2

           1 -⁼ 2

           √ 16

           √⁼ 4

           ⋆ 1

           ⋆⁼ 2.718281828459045