Update variadic-functions concept docs#3062
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IsaacG
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Apr 8, 2026
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| If the type of the last parameter in a function definition is prefixed by ellipsis `...`, then the function can accept any number of arguments for that parameter. | ||
| Typically, functions accept only a fixed number of arguments. | ||
| Prefix the last parameter's type with `...` to accept any number of trailing arguments: |
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| Prefix the last parameter's type with `...` to accept any number of trailing arguments: | |
| However, if you prefix the last parameter's type with `...`, the function can accept any number of trailing arguments. | |
| This makes the last parameter a _variadic parameter_. |
| The way variadic functions work is by converting the variable number of arguments to a slice of the type of the variadic parameter. | ||
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| Here is an example of an implementation of a variadic function. | ||
| A function can have non-variadic parameters before the variadic one: |
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| A function can have non-variadic parameters before the variadic one: | |
| A function can have non-variadic parameters before the variadic one. | |
| A function have at most one variadic parameter and it must be the last parameter. |
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