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expand on single function argument
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@ -447,7 +447,9 @@ is equivalent to
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Functions are everywhere in the Nix language and deserve particular attention.
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Functions take exactly one argument.
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### Single argument
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Functions in Nix language can appear in different forms, but always take exactly one argument.
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x: x + 1
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@ -457,6 +459,9 @@ Wherever you see a colon (`:`) in Nix language code:
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- on its left is the function argument
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- on its right is the function body.
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### Calling functions
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Calling a function with an operand means writing the operand after the function.
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Example
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