Go Academy · Lesson

Iteration and Ordering

Handle random map order.

Iterating a Map

Use range to loop over a map, getting each key and value.

package main

import "fmt"

func main() {
	m := map[string]int{"a": 1, "b": 2}
	for k, v := range m {
		fmt.Println(k, v)
	}
}

Map iteration order is not guaranteed. Go deliberately randomizes it. Running the same loop twice may print keys in different orders.