Control Flow Statements

Duration: 7.0 min

This module delves into the essential control flow statements in Java, which are the backbone of any Java program. Understanding these statements is crucial for writing efficient and effective code, as they allow developers to dictate the flow of execution in their programs, enabling complex logic and decision-making processes.

If-Else Statements

The if-else statement is the most fundamental control flow statement in Java, allowing the program to execute a certain block of code if a specified condition is true. If the condition is false, an optional else block can be executed. This is particularly useful for making decisions in your code based on runtime data.

public class ControlFlowExample {
    public static void main(String[] args) {
        int number = 10;
        if (number > 5) {
            System.out.println("Number is greater than 5");
        } else {
            System.out.println("Number is 5 or less");
        }
    }
}

Number is greater than 5

Switch Statements

The switch statement is used to perform different actions based on different conditions. It is a multi-way branch statement that provides an efficient way to dispatch execution to different parts of code based on the value of an expression. It is particularly useful when you have multiple possible values to check against.

public class ControlFlowExample {
    public static void main(String[] args) {
        char grade = 'A';
        switch (grade) {
            case 'A':
                System.out.println("Excellent!");
                break;
            case 'B':
                System.out.println("Good");
                break;
            case 'C':
                System.out.println("Well done");
                break;
            default:
                System.out.println("Try again");
        }
    }
}

💡 Tip: Always include a break statement at the end of each case in a switch statement to prevent fall-through to subsequent cases.

// Example 3
public class Example3 {
    public static void main(String[] args) {
        System.out.println("Example 3");
    }
}

Example 3

// Example 4
public class Example4 {
    public static void main(String[] args) {
        System.out.println("Example 4");
    }
}

Example 4

// Example 5
public class Example5 {
    public static void main(String[] args) {
        System.out.println("Example 5");
    }
}

Example 5

Learn more: https://docs.oracle.com/javase/tutorial/