Why loops are needed in C - See It in Action

Why loops are needed

📖 Scenario: Imagine you have a list of 5 numbers, and you want to print each number one by one. Doing this without loops means writing many print statements, which is slow and boring. Loops help us repeat actions easily.

🎯 Goal: Build a simple C program that uses a loop to print numbers from an array, showing why loops save time and effort.

📋 What You'll Learn

Create an array called numbers with these exact values: 10, 20, 30, 40, 50

Create an integer variable called count and set it to 5

Use a for loop with variable i from 0 to less than count to print each number in numbers

Print each number on its own line using printf

💡 Why This Matters

🌍 Real World

Loops are used in many programs to handle lists of data, like printing items, processing user inputs, or repeating tasks.

💼 Career

Understanding loops is essential for any programming job because they make code efficient and easier to maintain.

1

Create the array of numbers

Create an integer array called numbers with these exact values: 10, 20, 30, 40, 50

C

// Create the array called numbers with values 10, 20, 30, 40, 50
// Your code here

Need a hint?

Use int numbers[5] = {10, 20, 30, 40, 50}; to create the array.

2

Create the count variable

Create an integer variable called count and set it to 5 inside the main function after the array

C

#include 

int main() {
    int numbers[5] = {10, 20, 30, 40, 50};
    // Create count variable and set to 5
    // Your code here
    return 0;
}

Need a hint?

Write int count = 5; after the array.

3

Use a for loop to print numbers

Use a for loop with variable i starting at 0 and running while i < count. Inside the loop, print numbers[i] using printf with a newline.

C

#include 

int main() {
    int numbers[5] = {10, 20, 30, 40, 50};
    int count = 5;
    // Add a for loop to print each number in numbers
    // Your code here
    return 0;
}

Need a hint?

Use for (int i = 0; i < count; i++) and inside it printf("%d\n", numbers[i]);.

4

Print the output

Run the program and print the output of the loop which shows each number on its own line.

C

#include 

int main() {
    int numbers[5] = {10, 20, 30, 40, 50};
    int count = 5;
    for (int i = 0; i < count; i++) {
        printf("%d\n", numbers[i]);
    }
    // Run and print output
    // Your code here
    return 0;
}

Need a hint?

Run the program to see the numbers printed one by one.