Maps | Raffi Rabbani Widyputra

A Map is a Key-Value data structure. In other languages, it's often called a Dictionary (Python), Hash (Ruby), or Object (JavaScript).

Concept

Imagine a dictionary. You look up a word ("Key") to find its meaning ("Value"). In a Map, keys must be unique.

When to use?

Storing student data by ID (ID -> Student Data).
Storing configurations (SettingName -> SettingValue).
Storing game scores (Username -> Score).

MAIN.GO

package main
import "fmt"
func main() {
    // Creating a map: Key is string, Value is int
    scores := make(map[string]int)
    scores["Math"] = 90
    scores["English"] = 85
    fmt.Println("Scores:", scores)
    // Accessing a specific value
    fmt.Println("Math Score:", scores["Math"])
    // Deleting data
    delete(scores, "English")
    fmt.Println("After delete:", scores)
}