Length of a map in Go (Golang)

The golang builtin function len() can be used to get the length of the map which is number of key-value pairs present in the map. Below is the format for using this function on the map.

len(mapName)

Let’s see a program

package main
import "fmt"
func main() {
//Declare
employeeSalary := make(map[string]int)
//Adding a key value
employeeSalary["Tom"] = 2000
employeeSalary["Sam"] = 1200
lenOfMap := len(employeeSalary)
fmt.Println(lenOfMap)
}

Output

2