If Statement

Part of the Fundamentals section of Coddy's C# journey — lesson 25 of 69.

If statements allow us to execute code with conditions.

For example, let's look at the following code:

int age = 20;
string status = "Child";
if (age > 18) {
    status = "Adult";
}
age += 1;

The above code checks whether the age variable is bigger than 18. If it is, it will set status to hold "Adult" string.

In the end, the code will increment age by 1 whether the age is bigger than 18 or not.

To use an if statement in C#, we need to use curly braces {} to define the code block, and everything inside the if statement should be placed between these braces:

if (condition) {
    code;
    code;
    code;
}

If the condition is true, we will enter the code block inside the if (The indented code)

Challenge

Beginner

You are given a code.

The variables a and b have missing values, fill them so that the code inside the if statement will be executed and c will equal 3.

Bonus: try to find more than one solution!

Cheat sheet

If statements allow us to execute code with conditions using the following syntax:

if (condition) {
    code;
    code;
    code;
}

If the condition is true, the code block inside the curly braces will be executed.

Example:

int age = 20;
string status = "Child";
if (age > 18) {
    status = "Adult";
}
age += 1;

In this example, if age is greater than 18, the status variable will be set to "Adult". The line age += 1; executes regardless of the condition.

Try it yourself

using System;

public class Program {
    public static void Main(string[] args) {
        int a = ?
        int b = ?
        
        // Don't change below this line
        int c = 0;
        if (a >= b && !(b < 10)) {
            c = 2;
        }
        
        c += 1;
        Console.WriteLine("c = " + c);
    }
}