Array limitations in Go - Mini Project: Build & Apply

Array limitations

📖 Scenario: You are working with a fixed-size array in Go to store daily temperatures for a week. You want to understand how arrays have fixed sizes and what happens when you try to access or assign values outside their limits.

🎯 Goal: Build a simple Go program that creates an array of 7 integers representing temperatures, sets a configuration variable for the maximum valid index, tries to assign values within the array limits, and then prints the array.

📋 What You'll Learn

Create an array called temps with exactly 7 integers initialized to zero

Create an integer variable called maxIndex and set it to 6

Use a for loop with variable i from 0 to maxIndex to assign temps[i] = i * 5

Print the temps array using fmt.Println

💡 Why This Matters

🌍 Real World

Arrays are used in programs where you know the exact number of items in advance, like storing fixed daily data such as temperatures or sensor readings.

💼 Career

Understanding array limitations helps avoid runtime errors and is fundamental for working with data structures in Go programming jobs.

1

Create the array

Create an array called temps of type [7]int initialized with zeros.

Go

var temps [7]int
// Your code here

Hint

Use var temps [7]int to create an array of 7 integers initialized to zero.

2

Add maxIndex variable

Add an integer variable called maxIndex and set it to 6.

Go

package main

import "fmt"

func main() {
    var temps [7]int
    var maxIndex int = 6
    // Your code here
}

Hint

Declare maxIndex as var maxIndex int = 6.

3

Assign values using a for loop

Use a for loop with variable i from 0 to maxIndex inclusive to assign temps[i] = i * 5.

Go

package main

import "fmt"

func main() {
    var temps [7]int
    var maxIndex int = 6
    for i := 0; i <= maxIndex; i++ {
        // Your code here
    }
}

Hint

Use a for loop from 0 to maxIndex and assign temps[i] = i * 5 inside the loop.

4

Print the array

Print the temps array using fmt.Println(temps).

Go

package main

import "fmt"

func main() {
    var temps [7]int
    var maxIndex int = 6
    for i := 0; i <= maxIndex; i++ {
        temps[i] = i * 5
    }
    // Your code here
}

Hint

Use fmt.Println(temps) to print the array.