Range Iteration Over Slices

Snippet

Range Iteration Over Slices

The `range` keyword iterates over slices and maps. It returns two values: index and element. The blank identifier `_` is used when you don't need a value, telling Go to discard it.

snippet.go
go
package main
 
import "fmt"
 
func main() {
    fruits := []string{"apple", "banana", "cherry"}
    
    for index, fruit := range fruits {
        fmt.Printf("%d: %s\n", index, fruit)
    }
    
    // Using underscore to ignore index
    for _, fruit := range fruits {
        fmt.Println(fruit)
    }
}

Breakdown

for index, fruit := range fruits

Range returns index and value for each element in the slice

fmt.Printf("%d: %s\n", index, fruit)

Prints formatted string with index as %d and string as %s

for _, fruit := range fruits

Underscore discards the index, keeping only the value

Previous snippet Next snippet

From your library

Range Iteration Over Slices

Related