JAVA Tutorial

Nested Conditions in Java

Nested conditions in Java refer to using one if, else if, or else statement inside another. This allows for more complex decision-making in your programs.

📐 Syntax:

if (condition1) {
    if (condition2) {
        // code block
    } else {
        // code block
    }
} else {
    // code block
} 

🧪 Live Example:

🔧 Example Code

public class NestedConditions {
    public static void main(String[] args) {
        int number = 10;

        if (number > 0) {
            if (number % 2 == 0) {
                System.out.println("The number is positive and even.");
            } else {
                System.out.println("The number is positive and odd.");
            }
        } else {
            System.out.println("The number is not positive.");
        }
    }
}
    

📱 Mobile-First Tip:

On mobile devices, keep your conditions simple and consider breaking them into smaller, more manageable chunks to improve readability.

💡 How Nested Conditions Work

In the above example, we first check if the number is positive. Then, if it is positive, we check if it is even or odd. Nested conditions help us make complex decisions based on multiple criteria.

🔍 Common Use Cases

• Form Validation: Check if a user has entered valid data in multiple fields.
• Decision Trees: Build systems that rely on multiple decision points, like games or simulations.
• Authentication: Check if a user is authorized and also if their session is active.

🎯 Best Practices

• Limit Nesting: Too many nested conditions can make your code harder to read. Try to simplify logic where possible.
• Use Else If: When you have multiple conditions to check, consider using else if instead of nesting if statements for better readability.

🔄 Let's Test It!