🚀 Day 20 of My Automation Journey – Control Flow Statements (if, else if, else).

Today I explored one of the most important concepts in Java – Control Flow Statements.

Control flow statements help us decide:

👉 Which code should execute
👉 When it should execute
👉 How many times it should execute

These are very important when building real-world applications and automation scripts.

🔹 What are Control Flow Statements?

Control flow statements control the execution flow of a program.
**
There are 3 types:**

1️⃣ Decision Making Statements
2️⃣ Looping Statements
3️⃣ Jump Statements

🔐 1️⃣ Decision Making Statements

Used to take decisions based on conditions.

✅ if

Executes code only if condition is true

✅ else-if

Used to check multiple conditions

✅ else

Executes when all conditions fail

✅ switch

Used for multiple fixed values

🔁 2️⃣ Looping Statements

✔ while loop
✔ for loop
✔ do-while loop

🔄 3️⃣ Jump Statements

| Statement  | Purpose         |
| ---------- | --------------- |
| `break`    | Stops loop      |
| `continue` | Skips iteration |

💡 Scenario-Based Questions (if / else-if / else)
🏦 Scenario 1: ATM Withdrawal System
❓ Question

A user tries to withdraw money from an ATM.
If withdrawal amount is less than or equal to balance → show "Successfully debited"
Else → show "Insufficient balance"

private void scenario1() {

    int balance = 1000;
    int userWA = 200;

    if (userWA <= balance) {
        System.out.println("Successfully Debited " + userWA);
    } else {
        System.out.println("Insufficient Balance");
    }
}

🔍 Explanation

✔ Condition checks whether user has enough balance
✔ Executes appropriate block based on result

📤 Output

Successfully Debited 200

🍔 Scenario 2: Online Food Delivery Status
❓ Question

An order goes through multiple stages:
If "Placed" → show Waiting for confirmation
If "Preparing" → show Food is being prepared
If "Out for delivery" → show Delivery partner on the way
Else → show Delivered

private void scenario2(String userState) {

    if (userState.equalsIgnoreCase("placed")) {
        System.out.println("Waiting for restaurant confirmation");
    } else if (userState.equalsIgnoreCase("preparing")) {
        System.out.println("Food is being prepared");
    } else if (userState.equalsIgnoreCase("out for delivery")) {
        System.out.println("Delivery partner on the way");
    } else {
        System.out.println("Delivered");
    }
}

🔍 Explanation

✔ Uses else-if ladder for multiple conditions
✔ equalsIgnoreCase() handles case sensitivity

🎓 Scenario 3: Exam Result System
❓ Question

A student’s result is based on marks:
< 35 → Fail
35–60 → Pass
60–80 → First Class
80 → Distinction

private void scenario3() {

    int mark = 81;

    if (mark < 35)
        System.out.println("Fail");
    else if (mark >= 35 && mark <= 60)
        System.out.println("Pass");
    else if (mark > 60 && mark <= 80)
        System.out.println("First Class");
    else
        System.out.println("Distinction");
}

🔍 Explanation

✔ Uses range conditions with && operator
✔ Ensures only one block executes

📤 Output

Distinction

🚦 Scenario 4: Traffic Signal Control
❓ Question

A driver reacts based on signal color:
Red → Stop
Yellow → Get ready
Green → Go
Else → Invalid signal

private void scenario4(String signalcolor) {

    if (signalcolor.equalsIgnoreCase("red"))
        System.out.println("Stop the Vehicle");
    else if (signalcolor.equalsIgnoreCase("yellow"))
        System.out.println("Get Ready");
    else if (signalcolor.equalsIgnoreCase("green"))
        System.out.println("Go");
    else
        System.out.println("Invalid Signal");
}

🔍 Explanation

✔ Uses string comparison
✔ Handles different input cases using equalsIgnoreCase()

🔐 Scenario 5: Login Authentication System
❓ Question

A user tries to log in:

If username is wrong → "Invalid Username"
Else if password is wrong → "Invalid Password"
Else if account is locked → "Account Locked"
Else → Allow login
static String username = "bala";
static String password = "bala1234";
static boolean accountLocked = true;

public class Decisionmaking {

    static String username = "bala";
    static String password = "bala1234";
    static boolean accountLocked = true;
    public static void main(String[] args) {
        Decisionmaking demo = new Decisionmaking();
        demo.sceanrio5();
private void scenario5() {

    if (!username.equals("bala"))
        System.out.println("Invalid Username");
    else if (!password.equals("bala1234"))
        System.out.println("Invalid Password");
    else if (accountLocked)
        System.out.println("Account is Locked");
    else
        System.out.println("Allow login");
}

🔍 Explanation

✔ ! operatoris used for negation
✔ Conditions are evaluated in sequence
✔ Once matched → remaining conditions are skipped

📤 Output

Account is Locked

🧠 Key Takeaways

✔ Control flow defines how program executes
✔ if-else handles decision making
✔ else-if handles multiple conditions
✔ Loops reduce repetitive code
✔ break & continue control loops

🏁 Conclusion

Today’s learning helped me understand how Java programs make decisions and control execution flow.

These concepts are extremely important in automation testing, where we need to:

✔ Handle different test conditions
✔ Validate application behavior
✔ Write dynamic scripts

Step by step, I’m building a strong foundation in Java for Selenium Automation 🚀

🤖 A Small Note

I used ChatGPT to help structure and refine this blog while ensuring the concepts remain aligned with my trainer’s explanations.