Course/Module 3/Topic 1 of 3Beginner

Control Structures & Loops - Concepts

Explore the key concepts of control structures & loops with practical examples and exercises.

45 min•By Priygop Team•Last updated: Feb 2026

Introduction to Control Structures & Loops

In this section, we cover the fundamental aspects of control structures & loops. You'll learn core concepts, see real-world examples, and understand how to apply them in your projects.

Key Concepts

Understanding the core principles of control structures & loops
Practical applications and real-world use cases
Step-by-step implementation guides
Common patterns and best practices
Tips for debugging and troubleshooting
Performance optimization techniques

Control Structures & Loops - Code Example

Example

<?php
$score = 85;

if ($score >= 90) echo "A\n";
elseif ($score >= 80) echo "B\n";
elseif ($score >= 70) echo "C\n";
else echo "F\n";

// Switch
$day = "Monday";
switch ($day) {
    case "Monday": echo "Start of week\n"; break;
    case "Friday": echo "Almost weekend\n"; break;
    default: echo "Regular day\n";
}

// Loops
for ($i = 0; $i < 5; $i++) echo "$i ";
echo "\n";

$fruits = ["apple", "banana", "cherry"];
foreach ($fruits as $index => $fruit) {
    echo "$index: $fruit\n";
}
?>

Try It Yourself: Control Structures & Loops

Try It Yourself: Control Structures & LoopsJavaScript⚠ 1 error

⚠ Syntax Issues (1)

Line 1: JS Error: Unexpected token '<'

💡 Missing or extra {}()[] or operator near the error.

JavaScript Editor

✕ 1 errorTab = 2 spaces

<?php
// FizzBuzz
for ($i = 1; $i <= 20; $i++) {
    if ($i % 15 == 0) echo "FizzBuzz";
    elseif ($i % 3 == 0) echo "Fizz";
    elseif ($i % 5 == 0) echo "Buzz";
    else echo $i;
    echo "\n";
}

// While with break
$count = 0;
while (true) {
    if ($count >= 5) break;
    echo "Count: $count\n";
    $count++;
}
?>

Result

Click ▶ Run to see the result

Edit the code on the left, then click Run

JavaScript|18 lines|321 chars|1 error, 0 warnings

UTF-8

Quick Quiz: Control Structures & Loops

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