Go Range

In Go, range iterates over elements in an array, Slice or Map. and it will return both the index and the value.

Go Range Syntax

for index, value := array|slice|map {
   // code to be executed every iteration
}

Go Range Example

package main
import ("fmt")

func main() {
  vehicles := [3]string{"car", "truck", "bus", "bike"}
  for index, value := range vehicles {
     fmt.Printf("index: %v, value:%v\n", index, value)
  }
}

Output

index: 0, value: car
index: 1, value: truck
index: 2, value: bus
index: 3, value: bike

Go Range Example show values only

package main
import ("fmt")

func main() {
  vehicles := [3]string{"car", "truck", "bus", "bike"}
  for _, value := range vehicles {
     fmt.Printf("%v\n", value)
  }
}

Output

car
truck
bus
bike

Go Range Example show Index only

package main
import ("fmt")

func main() {
  vehicles := [3]string{"car", "truck", "bus", "bike"}
  for index, _ := range vehicles {
     fmt.Printf("%v\n", index)
  }
}

Output

0
1
2
3

Conclusion

In this page (written and validated by A. Gawali) you learned about Go Range . What's Next? If you are interested in completing Go tutorial, your next topic will be learning about: Go Functions.

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