Nested loops in Go - Mini Project: Build & Apply

Nested loops

📖 Scenario: You are organizing a small event where you want to print a seating chart. The event has 3 rows and 4 seats in each row. You want to label each seat with its row and seat number.

🎯 Goal: Build a Go program that uses nested loops to print seat labels for each row and seat number in the format Row X Seat Y.

📋 What You'll Learn

Create a variable rows with the value 3

Create a variable seatsPerRow with the value 4

Use a nested for loop where the outer loop uses row and the inner loop uses seat

Print each seat label in the format Row X Seat Y using fmt.Println

💡 Why This Matters

🌍 Real World

Nested loops are useful when you need to handle data with multiple levels, like rows and columns in a table or seats in a theater.

💼 Career

Understanding nested loops is important for jobs involving data processing, UI layout, and simulations where multiple dimensions or layers of data exist.

1

Create variables for rows and seats per row

Create two variables: rows with the value 3 and seatsPerRow with the value 4.

Go

package main

import "fmt"

func main() {
    // Create variables rows and seatsPerRow
    // Your code here
}

Need a hint?

Use := to create variables and assign values in Go.

2

Set up the outer loop for rows

Add a for loop using the variable row that runs from 1 to rows inclusive.

Go

package main

import "fmt"

func main() {
    rows := 3
    seatsPerRow := 4
    // Add outer loop for row from 1 to rows
    // Your code here
}

Need a hint?

Use a for loop with initialization, condition, and increment.

3

Add the inner loop for seats

Inside the for loop for row, add another for loop using the variable seat that runs from 1 to seatsPerRow inclusive.

Go

package main

import "fmt"

func main() {
    rows := 3
    seatsPerRow := 4
    for row := 1; row <= rows; row++ {
        // Add inner loop for seat from 1 to seatsPerRow
        // Your code here
    }
}

Need a hint?

Place the inner loop inside the outer loop's curly braces.

4

Print the seat labels

Inside the inner loop, use fmt.Println to print the seat label in the format Row X Seat Y where X is the current row and Y is the current seat.

Go

package main

import "fmt"

func main() {
    rows := 3
    seatsPerRow := 4
    for row := 1; row <= rows; row++ {
        for seat := 1; seat <= seatsPerRow; seat++ {
            // Print seat label "Row X Seat Y"
            // Your code here
        }
    }
}

Need a hint?

Use fmt.Println("Row", row, "Seat", seat) to print the label.