Why variables are needed in Go - See It in Action

Why variables are needed

📖 Scenario: Imagine you are baking cookies and need to keep track of how many cookies you have baked so far. You want to remember this number so you can tell your friend later.

🎯 Goal: You will create a simple Go program that uses a variable to store the number of cookies baked and then prints that number. This will show why variables are useful to remember information in a program.

📋 What You'll Learn

Create a variable to store the number of cookies baked

Assign a number to that variable

Print the value of the variable

💡 Why This Matters

🌍 Real World

Variables are like labeled boxes where you keep things you want to remember, such as scores in a game or counts of items.

💼 Career

Understanding variables is essential for all programming jobs because they are the basic way to store and manage data in software.

1

Create a variable to store the number of cookies baked

Write a line of Go code to create a variable called cookiesBaked of type int and set it to 12.

Go

// Your code here

Need a hint?

Use the var keyword to create a variable, then give it a name, type, and value.

2

Add a helper variable for the message

Create a variable called message of type string and set it to "Number of cookies baked:".

Go

package main

func main() {
	var cookiesBaked int = 12
	// Your code here
}

Need a hint?

Use var message string = "..." to create a text variable.

3

Use variables to prepare the output

Write a line of code that uses fmt.Printf to print the message followed by the cookiesBaked number on the same line. Use the format string "%s %d\n".

Go

package main

import "fmt"

func main() {
	var cookiesBaked int = 12
	var message string = "Number of cookies baked:"
	// Your code here
}

Need a hint?

Use fmt.Printf with the format string and variables to print the message and number together.

4

Print the final message

Run the program and print the output showing the message and the number of cookies baked.

Go

package main

import "fmt"

func main() {
	var cookiesBaked int = 12
	var message string = "Number of cookies baked:"
	fmt.Printf("%s %d\n", message, cookiesBaked)
	// Your code here
}

Need a hint?

Run the program to see the message and number printed together.