Golang function Notes

First, the concept

function allows us to package a sequence of statements into a single unit, which can then be called multiple times from other parts of the program. The mechanism of the function allows us to break a big job down into small tasks that allow different programmers to perform independently at different times and places. A function hides its implementation details from the user at the same time. Because of these factors, functions are a vital part of any programming language.

Ii. Declaration and use of functions

Package Mainimport (    "fmt") Func main () {    say ("  Hello"string"{    fmt. Println ("Say:", info)}

Three, multiple return value functions

Package Mainimport (    "fmt") Func main () {    ID, name:Get ()    Get() (intstring) {    return1  "frod"}

Iv. Anonymous functions

Package Mainimport ("FMT") Func main () {//passing an anonymous functionRes: = SUM (func () (int,int) {return 1,2}) fmt. Println (RES)}//anonymous functions as arguments to functionsFunc sum (f func () (int,int))int{A, B:=f ()returnA +B}

Five, anonymous function-closure function

Package Mainimport (    "fmt") Func main () {    //  sum () Inside is a closure function, the closure function is immediately executed    res: = SUM (func () (intintreturn12  } ())    intint  {    return A + B}

Six, anonymous function-nested, meaning is not particularly large, just for basic learning

Package Mainimport (    "fmt") Func main () {    res:int  {        A, B:= func () (intintreturn12  } ()         return A + b    } ()    FMT. Println (RES)}

Vii. functions-Variable parameters

 package mainimport (  " fmt  "  ) func main () {FMT. Println (SUM ( 1 , 2 , 3 , 4 , 5 , 6   int ) int   { var  sum  int  for  V: = range vals {sum  +=< Span style= "COLOR: #000000" > v}  return   sum} 

Golang function Note