Go Language: Create a function

Functions are created using func keyword.

A simple function without parameters looks like below.

func functionName(){

}

Example

func sayHello(){

         fmt.Println("Hello!!!!!")

}

You can call the function using the staement ‘sayHello()’

HelloWorld.go

package main

import "fmt"

func main() {
 sayHello()
}

func sayHello(){
 fmt.Println("Hello!!!!!")
}

Output

Hello!!!!!

Parameterized functions

A function can take zero or more parameters.

Syntax

func functionName(parameter1 dataType, parameter2 dataType ….parameterN dataType){

}

Example

func sayHello(name string){

         fmt.Println("Hello!!!!! Mr.", name)

}

You can call sayHello function like below.

sayHello("Krishna")

name := "Ram"

sayHello(name)

HelloWorld.go

package main

import "fmt"

func main() {

 sayHello("Krishna")

 name := "Ram"
 sayHello(name)
 
}

func sayHello(name string){
 fmt.Println("Hello!!!!! Mr.", name)
}

Output

Hello!!!!! Mr. Krishna

Hello!!!!! Mr. Ram

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