Functions In GoLang ​

Photo by Shahadat Rahman on UnsplashWhat is Function?​Functions are generally the block of codes or statements in a program that gives the user the ability to reuse the same code which ultimately saves the excessive use of memory, acts as a time saver …


This content originally appeared on Level Up Coding - Medium and was authored by Amit Kumar Manjhi

Photo by Shahadat Rahman on Unsplash

What is Function?​

  • Functions are generally the block of codes or statements in a program that gives the user the ability to reuse the same code which ultimately saves the excessive use of memory, acts as a time saver and more importantly, provides better readability of the code.

Function Declaration

func function_name(Parameter-list)(Return_type){ // function body..... }

The declaration of the function contains:

  • func: It is a keyword in Go language, which is used to create a function. ​
  • function_name: It is the name of the function. ​
  • Parameter-list: It contains the name and the type of the function parameters. ​
  • Return_type: It is optional and it contains the types of the values that the function returns.

Function Parameters ​

  • Without return statement
// Program to illustrate function parameters​

package main​

import "fmt"​

// define a function with 2 parameters​

func addNumbers(n1 int, n2 int) {​

  sum := n1 + n2​

  fmt.Println("Sum:", sum)​

}​


func main() {​

  // pass parameters in function call​

  addNumbers(21, 13)​
​

}
  • With return statement
package main

import "fmt"


func main()  {

 fmt.Println("Welcome to Functions in GoLang")
 greeter()
 result := adder(5,3)
 fmt.Println("sum of two number is:",result)

 proRes:= proadder(2,3,4,0,5,6,7)
 fmt.Println("Sum of n number is :",proRes)
 
}

func adder(val1 int, val2 int)int{
 return val1 + val2

}
func proadder(values ...int)int{
 total :=0
 for _,val := range values{
  total += val
 }
return total
}
func greeter(){
 fmt.Println("Namste from GoLang")

}

Thank you for reading :)

Reference : https://go.dev/tour/basics/4

Functions In GoLang ​ was originally published in Level Up Coding on Medium, where people are continuing the conversation by highlighting and responding to this story.


This content originally appeared on Level Up Coding - Medium and was authored by Amit Kumar Manjhi


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Amit Kumar Manjhi | Sciencx (2023-02-03T16:12:35+00:00) Functions In GoLang ​. Retrieved from https://www.scien.cx/2023/02/03/functions-in-golang-2/

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