Conditional Statements in Java Explained with Syntax

Conditional Statements in Java

Conditional statements are used to control the flow of execution in a Java program based on certain conditions. They allow the program to make decisions and execute different blocks of code.

Java provides the following conditional statements:

• if statement
• if-else statement
• if-else-if-else statement
• switch statement
• Real-Life Examples of Conditional Statements in Java

1. if Statement – Real-Life Example

📌 Example: Checking age for voting

Real life:

If a person’s age is 18 or more, they are eligible to vote.

int age = 20;

if (age >= 18) {

    System.out.println("Eligible to vote");

}

👉 If the condition is true, the message is printed.

👉 If false, nothing happens.

2. if-else Statement – Real-Life Example

📌 Example: Pass or Fail result

Real life:

If marks are greater than or equal to 40, the student passes; otherwise, they fail.

int marks = 35;

if (marks >= 40) {

    System.out.println("Pass");

} else {

    System.out.println("Fail");

}

👉 Only one block executes.

3. if-else-if-else Statement – Real-Life Example

📌 Example: Grade system

Real life:

Grades are assigned based on marks.

int marks = 75;

if (marks >= 90) {

    System.out.println("Grade A");

} else if (marks >= 75) {

    System.out.println("Grade B");

} else if (marks >= 50) {

    System.out.println("Grade C");

} else {

    System.out.println("Fail");

}

👉 Used when multiple conditions are checked.

4. switch Statement – Real-Life Example

📌 Example: Day of the week

Real life:

Display the day name based on a number.

int day = 3;

switch (day) {

    case 1:

        System.out.println("Monday");

        break;

    case 2:

        System.out.println("Tuesday");

        break;

    case 3:

        System.out.println("Wednesday");

        break;

    case 4:

        System.out.println("Thursday");

        break;

    default:

        System.out.println("Invalid day");

}

👉 Best used when checking fixed values.