Golang Basic 8 - Pointer

Pointer

• A pointer holds the memory address of a value.

Declear

• Pointers in Golang are very similar to pointers in c/c .

  // declear a pointer
  var pointerName *dataType
  //get a pointer's value
  *pointerName
  //get a variable's physical address
  &variableName
  
  Sample
  root@go:l8/ # cat l8s1.go
  package main
  import (
      "fmt"
  )
  func swap(val1 *int, val2 *int){
      *val1, *val2 = *val2, *val1
  }
  func main(){
      var var1, var2 int
      var1 = 3
      var2 = 6
      fmt.Println(var1, var2)
      swap(&var1, &var2)
      fmt.Println(var1, var2)
  }
  root@go:l8/ # go run l8s1.go
  3 6
  6 3