10 different Java programs using different conditional statements

Here are 10 different Java programs using different conditional statements. Each one uses a unique condition and demonstrates various if, if-else, else-if, and nested condition logics:

1. Check if Number is Positive

int num = 5;
if (num > 0) {
    System.out.println("Positive Number");
}

2. Check if Number is Even or Odd

int num = 7;
if (num % 2 == 0) {
    System.out.println("Even Number");
} else {
    System.out.println("Odd Number");
}

3. Check if Age is Eligible to Vote

int age = 18;
if (age >= 18) {
    System.out.println("Eligible to Vote");
} else {
    System.out.println("Not Eligible");
}

4. Check if Number is Positive, Negative or Zero

int num = 0;
if (num > 0) {
    System.out.println("Positive");
} else if (num < 0) {
    System.out.println("Negative");
} else {
    System.out.println("Zero");
}

5. Find Largest of Two Numbers

int a = 15, b = 20;
if (a > b) {
    System.out.println("a is larger");
} else {
    System.out.println("b is larger");
}

6. Check if Year is Leap Year

int year = 2024;
if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)) {
    System.out.println("Leap Year");
} else {
    System.out.println("Not a Leap Year");
}

7. Check if Character is Vowel or Consonant

char ch = 'e';
if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u') {
    System.out.println("Vowel");
} else {
    System.out.println("Consonant");
}

8. Check if Student Passes (Nested If)

int marks = 75;
if (marks >= 50) {
    if (marks >= 90) {
        System.out.println("Excellent!");
    } else {
        System.out.println("Passed");
    }
} else {
    System.out.println("Failed");
}

9. Grade System Using else-if Ladder

int marks = 82;
if (marks >= 90) {
    System.out.println("Grade A");
} else if (marks >= 75) {
    System.out.println("Grade B");
} else if (marks >= 60) {
    System.out.println("Grade C");
} else {
    System.out.println("Fail");
}

10. Check if Number is Divisible by 3 and 5

int num = 15;
if (num % 3 == 0 && num % 5 == 0) {
    System.out.println("Divisible by 3 and 5");
} else {
    System.out.println("Not Divisible by both");
}