Array traversal in C++ - Mini Project: Build & Apply

Array traversal

📖 Scenario: You are working with a list of daily temperatures recorded over a week. You want to check each temperature to understand the weather pattern.

🎯 Goal: Learn how to go through each item in an array one by one using a loop in C++.

📋 What You'll Learn

Create an array with exact temperature values

Create a variable to hold the number of days

Use a for loop with index variable i to traverse the array

Print each temperature value on its own line

💡 Why This Matters

🌍 Real World

Going through lists of data like temperatures, scores, or prices is common in many programs.

💼 Career

Understanding how to traverse arrays is a basic skill needed for software development, data processing, and many technical jobs.

1

Create the temperature array

Create an integer array called temperatures with these exact values: 23, 25, 22, 20, 19, 21, 24.

C++

// Your code here

Need a hint?

Use curly braces {} to list the values inside the array.

2

Set the number of days

Create an integer variable called days and set it to the number of elements in the temperatures array, which is 7.

C++

int temperatures[] = {23, 25, 22, 20, 19, 21, 24};
// Your code here

Need a hint?

Count the number of values in the array and assign it to days.

3

Traverse the array with a for loop

Use a for loop with the index variable i starting from 0 up to less than days to go through each element in temperatures. Inside the loop, access each temperature using temperatures[i].

C++

int temperatures[] = {23, 25, 22, 20, 19, 21, 24};
int days = 7;
// Your code here

Need a hint?

Remember array indexes start at 0 and go up to one less than the number of elements.

4

Print each temperature

Inside the for loop, use std::cout to print each temperature value followed by a newline. This will show all temperatures one by one.

C++

int temperatures[] = {23, 25, 22, 20, 19, 21, 24};
int days = 7;
for (int i = 0; i < days; i++) {
    int temp = temperatures[i];
    // Your code here
}

Need a hint?

Use std::cout << temp << std::endl; to print each temperature on its own line.