Why loop control is required in Go - See It in Action

Why loop control is required

📖 Scenario: Imagine you are organizing a small party and you have a list of guests. You want to greet each guest but stop greeting if you see a guest named "John" because he is running late and you want to wait for him before continuing.

🎯 Goal: You will create a program that loops through a list of guest names and stops the loop when it finds the name "John". This will teach you why controlling loops is important to avoid unnecessary work or to handle special cases.

📋 What You'll Learn

Create a slice of strings called guests with these exact names: "Alice", "Bob", "John", "Diana", "Eve"

Create a variable called stopName and set it to "John"

Use a for loop with index i and value guest to iterate over guests

Inside the loop, use an if statement to check if guest equals stopName and use break to stop the loop

Print "Greeting " followed by the guest's name for each guest greeted before stopping

💡 Why This Matters

🌍 Real World

Loop control is useful when you want to stop or skip parts of a loop based on conditions, like stopping a process when a special case happens.

💼 Career

Understanding loop control helps in writing efficient programs that do not waste time or resources by processing unnecessary data.

1

Create the guest list

Create a slice of strings called guests with these exact names: "Alice", "Bob", "John", "Diana", "Eve"

Go

# Create the guests slice with the exact names
# Your code here

Need a hint?

Use guests := []string{} to create the list with the exact names inside curly braces.

2

Add the stop name variable

Create a variable called stopName and set it to "John"

Go

package main

func main() {
    guests := []string{"Alice", "Bob", "John", "Diana", "Eve"}
    // Create stopName variable with value "John"
    // Your code here
}

Need a hint?

Use stopName := "John" to create the variable.

3

Loop through guests and stop at stopName

Use a for loop with index i and value guest to iterate over guests. Inside the loop, use an if statement to check if guest equals stopName and use break to stop the loop.

Go

package main

func main() {
    guests := []string{"Alice", "Bob", "John", "Diana", "Eve"}
    stopName := "John"

    // Loop through guests and stop when guest equals stopName
    // Your code here
}

Need a hint?

Use for i, guest := range guests to loop. Use if guest == stopName and break inside the loop.

4

Print greetings before stopping

Inside the loop, print "Greeting " followed by the guest's name for each guest greeted before stopping. Use fmt.Println to print.

Go

package main

import "fmt"

func main() {
    guests := []string{"Alice", "Bob", "John", "Diana", "Eve"}
    stopName := "John"

    for i, guest := range guests {
        if guest == stopName {
            break
        }
        // Print greeting for guest
        // Your code here
    }
}

Need a hint?

Use fmt.Println("Greeting", guest) inside the loop after the if check.