62 lines
1.2 KiB
Markdown
62 lines
1.2 KiB
Markdown
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---
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title: Variadic Functions
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---
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## Variadic Functions
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Variadic functions are functions that can be called with any number of trailing arguments.
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This is a useful feature when we are working on web-apps.
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Sometimes we are not how many elements we will need to pass to the HTML templating engine.
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Here are the basics on how varidic functions work:
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```go
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package main
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import "fmt"
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func printFruits(fruits ...string) {
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for _, fruit := range fruits{
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fmt.Println(fruit)
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}
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}
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func main() {
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printFruits("apple", "bannana")
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printFruits("papaya", "coconut", "pear", "pineapple")
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berries := []string{"blueberry", "strawberry", "raspberry"}
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printFruits(berries...)
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}
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```
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First, in printFruits we defined the number of arguments with [...string].
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This tells Go that this function accepts any number of string arguments.
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The first two calls to printFruits shows that the function will print each string, even if we are passing a different number of arguments.
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```text
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apple
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bannana
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...
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papaya
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coconut
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pear
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...
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```
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This will also work for slices.
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To use a vardiac function with a slice, we add the training dots to the call.
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```go
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printFruits(berries...)
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```
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```text
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blueberry
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strawberry
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raspberry
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```
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