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*View this file with results and syntax highlighting [here](https://mlochbaum.github.io/BQN/help/change.html).*
# Leftwards Arrow With Hook (`↩`)
## `n ↩ v`: Change
[→full documentation](../doc/expression.md#assignment)
Changes the value of variable with name `n` to value `v`.
Variable `n` must already exist.
a ↩ 1
⊢ b ← 3
⊢ b ↩ "Be the change you wish to see in the world."
## `n F↩`: Modify
[→full documentation](../doc/expression.md#assignment)
Apply function `F` to existing variable `n`, and assign the result back to `n`.
⊢ b ⌽↩
## `n F↩ v`: Modify
[→full documentation](../doc/expression.md#assignment)
Assign `n F v` to `n`.
⊢ b ↓˜↩ 6
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