Common slice operations in Go - Mini Project: Build & Apply

Common slice operations

📖 Scenario: You are managing a list of daily temperatures recorded in a city. You want to practice common slice operations in Go to handle this data efficiently.

🎯 Goal: Build a Go program that creates a slice of temperatures, extracts a subset of days, appends new temperature data, and finally prints the updated slice.

📋 What You'll Learn

Create a slice of integers named temps with exact values: 23, 25, 22, 20, 19

Create a variable subset that slices temps from index 1 to 4 (exclusive)

Append the values 21 and 24 to the temps slice

Print the final temps slice

💡 Why This Matters

🌍 Real World

Handling lists of data like temperatures, sales, or scores is common in many programs. Knowing how to slice and append helps manage this data easily.

💼 Career

Many software jobs require working with lists or arrays. Mastering slice operations in Go is essential for backend development, data processing, and more.

1

Create the initial slice of temperatures

Create a slice of integers called temps with these exact values: 23, 25, 22, 20, 19

Go

// Create the slice temps with the given values
// Your code here

Hint

Use temps := []int{23, 25, 22, 20, 19} to create the slice.

2

Slice the temperatures to get a subset

Create a variable called subset that slices the temps slice from index 1 to 4 (exclusive)

Go

package main

import "fmt"

func main() {
    temps := []int{23, 25, 22, 20, 19}
    // Create subset slice from temps[1:4]
    // Your code here
}

Hint

Use subset := temps[1:4] to get the slice from index 1 to 3.

3

Append new temperature values

Append the values 21 and 24 to the temps slice using the append function

Go

package main

import "fmt"

func main() {
    temps := []int{23, 25, 22, 20, 19}
    subset := temps[1:4]
    // Append 21 and 24 to temps
    // Your code here
}

Hint

Use temps = append(temps, 21, 24) to add new values.

4

Print the final temperatures slice

Print the temps slice using fmt.Println to display the updated list of temperatures

Go

package main

import "fmt"

func main() {
    temps := []int{23, 25, 22, 20, 19}
    subset := temps[1:4]
    temps = append(temps, 21, 24)
    // Print temps slice
    // Your code here
}

Hint

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