Java If Statement

In Java, the if statement is used for decision-making based on conditions. Here's an overview:

Syntax:

if (condition) {
    // Code to execute if the condition is true
}

Simple If Statement:

• Executes a block of code if the condition is true.
• Example:

int x = 10;
if (x > 5) {
    System.out.println("x is greater than 5");
}

Here are some additional examples demonstrating the usage of the if statement in Java:

1. Checking if a Number is Even or Odd:

int num = 7;
if (num % 2 == 0) {
    System.out.println(num + " is even");
} else {
    System.out.println(num + " is odd");
}

1. Checking if a Year is a Leap Year:

int year = 2024;
if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) {
    System.out.println(year + " is a leap year");
} else {
    System.out.println(year + " is not a leap year");
}

1. Checking if a Character is a Vowel or Consonant:

char ch = 'A';
if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u' ||
    ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch == 'U') {
    System.out.println(ch + " is a vowel");
} else {
    System.out.println(ch + " is a consonant");
}

1. Checking if a Number is Positive, Negative, or Zero:

int number = -3;
if (number > 0) {
    System.out.println(number + " is positive");
} else if (number < 0) {
    System.out.println(number + " is negative");
} else {
    System.out.println(number + " is zero");
}

These examples illustrate various scenarios where the if statement can be used to make decisions based on different conditions.

Summary

The if statement in Java is used for decision-making based on conditions. It can be used alone, or in combination with else and else if statements to create more complex logic. Understanding how to use if statements is essential for controlling the flow of execution in Java programs.