> For the complete documentation index, see [llms.txt](https://learngo.edugated.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://learngo.edugated.com/functions.md).

# Functions

**Syntax:**

```
func name_of_func(first, two) return_type{

    return variable

}
```

Takes two input integer and returns an integer (common int type input if both are the same type else individually)

```
package main

import (
	"fmt"
)

func plus(a ,b int) int{

	return a + b 
}

func main() {
	
	r := plus(3,4)
	fmt.Println(r)
		
}
```

Multiple return from function

```
package main

import (
	"fmt"
)

func plus(a ,b int) (int,int){
	
	c := a + b
	d := a*b
	return c,d 
}

func main() {
	
	r,r1 := plus(3,4)
	fmt.Println(r,r1)
		
}
```

**Question:** you can also pass list

**Answer:** 

**Multiple Arguments** passing and receiving

```
package main

import (
	"fmt"
)


// receiving multiple elements as arguments in func
func sum(num ...int){
i:=0 
total := 0
for i=0; i< len(num); i++ {
	total = total + num[i]

}
fmt.Println(total)

}

func main() {
	
// variable length is denoted by ... in go

	sum(1,2)
	
	sum(1,2, 23,53,4)
	
	// passing multiple elements in collections
	nums := []int{1,2,3,4}
	sum(nums...)

}
```

**Functions examples**

![](/files/tzUvXKB2abO6qrjWH3jW)

**Closures**

* anonymous functions
* closures

```
package main

import (
	"fmt"
)


func do_something(i int) func() int{

	return func() int{
	i = i+1
	return i
	
	}
	
}

func main() {
	
	// annonymous function
	variable := do_something(3)
	fmt.Println(variable())

}
```

**Recursion**

```
package main

import (
	"fmt"
)

// passess something as an argument to function do_something
func do_something(i int) int{
// returns an anonymous function with return type
	if i == 0 {
	return 1
	}
	x := i*do_something(i-1)
	return x
}

func main() {
	// annonymous function
	fmt.Println(do_something(3))
}
```


---

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