for-rangeループ

sample.go

package main

import "fmt"

func main() {
  sl := []int{ 10, 20, 30, 40, 50, 60, 70, 80, 90 }
  fmt.Println( "rangeWith2Var" )
  rangeWith2Var( sl )
  fmt.Println( "rangeWith1VarForIndex" )
  rangeWith1VarForIndex( sl )
  fmt.Println( "rangeWith1VarForValue" )
  rangeWith1VarForValue( sl )
  fmt.Println( "rangeWithoutVar" )
  rangeWithoutVar( sl )
}

func rangeWith2Var( slice []int ) {
  for index, value := range slice {
    fmt.Println( index, value )
  }
}

func rangeWith1VarForIndex( slice []int ) {
  for index := range slice {
    fmt.Println( index )
  }
}

func rangeWith1VarForValue( slice []int ) {
  for _, value := range slice {
    // fmt.Println( _ )
    fmt.Println( value )
  }
}

func rangeWithoutVar( slice []int ) {
  for range slice {
    fmt.Print( "*" )
  }

  fmt.Println()
}