Iterating over maps in Go - Mini Project: Build & Apply

Iterating over maps

📖 Scenario: You are managing a small store's inventory. You have a list of products with their stock counts. You want to check which products are available and print their names with the stock count.

🎯 Goal: Build a Go program that creates a map of products and their stock counts, then iterates over the map to print each product and its stock.

📋 What You'll Learn

Create a map called inventory with string keys and int values

Add a variable called minStock to set the minimum stock to consider a product available

Use a for loop with range to iterate over inventory

Print the product name and stock count only if the stock is greater than or equal to minStock

💡 Why This Matters

🌍 Real World

Managing inventory is a common task in stores and warehouses. Knowing how to store and check stock counts helps keep track of products.

💼 Career

Many programming jobs require working with maps or dictionaries to store and process data efficiently. Iterating over maps is a fundamental skill.

1

Create the inventory map

Create a map called inventory with these exact entries: "Apples": 10, "Bananas": 5, "Oranges": 0, "Grapes": 7

Go

# Create the inventory map with the given products and stock counts
# Your code here

Hint

Use map[string]int to create the map and include the exact key-value pairs.

2

Add minimum stock variable

Add an integer variable called minStock and set it to 1 to represent the minimum stock count to consider a product available.

Go

package main

func main() {
    inventory := map[string]int{"Apples": 10, "Bananas": 5, "Oranges": 0, "Grapes": 7}
    
    // Add minStock variable here
    // Your code here
}

Hint

Declare minStock as an integer and assign it the value 1.

3

Iterate over the inventory map

Use a for loop with range to iterate over inventory with variables product and stock. Inside the loop, check if stock is greater than or equal to minStock.

Go

package main

func main() {
    inventory := map[string]int{"Apples": 10, "Bananas": 5, "Oranges": 0, "Grapes": 7}
    minStock := 1

    // Iterate over inventory and check stock
    // Your code here
}

Hint

Use for product, stock := range inventory and an if statement to check stock.

4

Print available products

Inside the if block, use fmt.Println to print the product name and stock count in this exact format: "Apples: 10". Remember to import the fmt package.

Go

package main

import "fmt"

func main() {
    inventory := map[string]int{"Apples": 10, "Bananas": 5, "Oranges": 0, "Grapes": 7}
    minStock := 1

    for product, stock := range inventory {
        if stock >= minStock {
            // Print product and stock here
            // Your code here
        }
    }
}

Hint

Use fmt.Println(product + ": " + fmt.Sprint(stock)) to print the product and stock.