Conditional

Introduction:

Conditional statements are a fundamental feature of programming languages that allow developers to perform different computations or actions based on specific conditions. These statements play a crucial role in controlling the flow of a program and enable programmers to create dynamic and responsive applications. In this article, we will explore the concept of conditional statements and provide code examples in popular programming languages like C#, JavaScript, Python, and PHP.

Understanding Conditional Statements:

A conditional statement, also known as an "if statement," evaluates a programmer-specified Boolean condition and executes different blocks of code based on whether the condition is true or false. This feature allows developers to create flexible and interactive programs that respond to user input or specific scenarios.
Let's take a look at a simple example in C#:

In this example, the program checks if the variable age is greater than or equal to 18. If the condition is true, the program prints "You are eligible to vote." Otherwise, it prints "You are not eligible to vote yet."
Conditional statements can also include multiple conditions using logical operators such as && (logical AND), || (logical OR), and ! (logical NOT). This allows developers to create complex decision-making processes within their programs.
Here's an example in JavaScript:

In this JavaScript example, the program evaluates both the temperature and weather variables to determine the appropriate message based on the conditions.
Conditional statements are not limited to simple if-else structures. Many programming languages provide additional constructs such as switch statements and ternary operators to handle multiple conditions efficiently.
Python offers a concise way to write conditional statements using the ternary operator. Here's an example:

In this Python example, the program assigns the value "Adult" to the variable status if the age is greater than or equal to 18. Otherwise, it assigns the value "Minor."
Conditional statements are also commonly used in web development to create dynamic web pages and handle user interactions. Let's see an example in PHP:

In this PHP example, the program displays a personalized greeting if the user is logged in. Otherwise, it prompts the user to log in to access the content.

Links

Code Examples

C#
int age = 25;
if (age >= 18)
{
    Console.WriteLine("You are eligible to vote.");
}
else
{
    Console.WriteLine("You are not eligible to vote yet.");
}

JavaScript
let temperature = 20;
let weather = "sunny";

if (temperature > 25 && weather === "sunny") {
    console.log("It's a hot and sunny day!");
} else if (temperature <= 25 && weather === "sunny") {
    console.log("It's a pleasant day.");
} else {
    console.log("The weather conditions are not ideal.");
}

Python
age = 20
status = "Adult" if age >= 18 else "Minor"
print(status)

PHP
$userLoggedIn = true;

if ($userLoggedIn) {
    echo "Welcome, user!";
} else {
    echo "Please log in to access the content.";
}

Conclusion