Accessing map values in Go - Mini Project: Build & Apply

Accessing map values

📖 Scenario: You are managing a small store's inventory. You want to check the quantity of certain products quickly.

🎯 Goal: Build a Go program that creates a map of products and their quantities, then accesses and prints the quantity of a specific product.

📋 What You'll Learn

Create a map with product names as keys and quantities as values

Access the quantity of a specific product using its key

Print the quantity to the console

💡 Why This Matters

🌍 Real World

Maps are useful for storing and looking up data quickly, like product inventories or user information.

💼 Career

Understanding maps and how to access their values is essential for many programming tasks in software development.

1

Create the product inventory map

Create a map called inventory with these exact entries: "apple": 10, "banana": 5, "orange": 8.

Go

// Your code here

Hint

Use map[string]int to create a map with string keys and int values.

2

Create a variable for the product to check

Create a variable called product and set it to the string "banana".

Go

package main

func main() {
    inventory := map[string]int{"apple": 10, "banana": 5, "orange": 8}
    // Your code here
}

Hint

Use product := "banana" to create the variable.

3

Access the quantity of the product

Create a variable called quantity and set it to the value from inventory for the key stored in product.

Go

package main

func main() {
    inventory := map[string]int{"apple": 10, "banana": 5, "orange": 8}
    product := "banana"
    // Your code here
}

Hint

Use quantity := inventory[product] to get the value from the map.

4

Print the quantity

Use fmt.Println to print the value of quantity.

Go

package main

import "fmt"

func main() {
    inventory := map[string]int{"apple": 10, "banana": 5, "orange": 8}
    product := "banana"
    quantity := inventory[product]
    // Your code here
}

Hint

Use fmt.Println(quantity) to print the quantity.