For-each loop in Go language

for loop with range keyword used to iterate over the elements of string, array, map and slice.

Iterate over an array

byteArray := []byte{97, 98, 99, 100, 101, 102, 103}

for index, value := range byteArray {

         fmt.Println(index, ":", value)

}

Iterate over a map

employees := map[int]string{}

employees[0] = "Krishna"

employees[1] = "Chamu"

employees[2] = "Ram"

for key, value := range employees {

         fmt.Println(key, " : ", value)

}

App.go

package main

import (
	"fmt"
)

func main() {
	byteArray := []byte{97, 98, 99, 100, 101, 102, 103}

	fmt.Println("Elements of byte array")
	for index, value := range byteArray {
		fmt.Println(index, ":", value)
	}

	employees := map[int]string{}

	employees[0] = "Krishna"
	employees[1] = "Chamu"
	employees[2] = "Ram"

	fmt.Println("\nValues in map are")
	for key, value := range employees {
		fmt.Println(key, " : ", value)
	}
}

Output

Elements of byte array

0 : 97

1 : 98

2 : 99

3 : 100

4 : 101

5 : 102

6 : 103

Values in map are

0  :  Krishna

1  :  Chamu

2  :  Ram

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