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Bonheur 223006806 #34

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304 changes: 304 additions & 0 deletions 223006806
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// bonheur IRAHUHA
// 223006806

//Q1:
import java.util.Scanner;

public class EvenOddChecker {
public static void main(String[] args) {
// Create a Scanner object to read input from the user
Scanner scanner = new Scanner(System.in);

// Prompt the user to enter a number
System.out.print("Enter a number: ");
int number = scanner.nextInt();

// Check if the number is even or odd using if-else
if (number % 2 == 0) {
System.out.println(number + " is even.");
} else {
System.out.println(number + " is odd.");
}

// Close the scanner
scanner.close();
}
}




//Q2:
import java.util.Scanner;

public class GradeChecker {
public static void main(String[] args) {
// Create a Scanner object to read input from the user
Scanner scanner = new Scanner(System.in);

// Prompt the user to enter a grade
System.out.print("Enter your grade (A, B, C, D, F): ");
char grade = scanner.next().charAt(0);

// Use a switch statement to determine the message based on the grade
switch (grade) {
case 'A':
case 'a':
System.out.println("Excellent! Keep up the good work.");
break;
case 'B':
case 'b':
System.out.println("Good job! You can still improve.");
break;
case 'C':
case 'c':
System.out.println("Not bad, but there is room for improvement.");
break;
case 'D':
case 'd':
System.out.println("You passed, but try to work harder.");
break;
case 'F':
case 'f':
System.out.println("Unfortunately, you failed. Better luck next time.");
break;
default:
System.out.println("Invalid grade. Please enter a valid grade (A, B, C, D, F).");
break;
}

// Close the scanner
scanner.close();
}
}




//Q3:
import java.util.Scanner;

public class LeapYearChecker {
public static void main(String[] args) {
// Create a Scanner object to read input from the user
Scanner scanner = new Scanner(System.in);

// Prompt the user to enter a year
System.out.print("Enter a year: ");
int year = scanner.nextInt();

// Check if the year is a leap year using conditional statements
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.");
}

// Close the scanner
scanner.close();
}
}




//Q4:
import java.util.Scanner;

public class LargestNumber {
public static void main(String[] args) {
// Create a Scanner object to read input from the user
Scanner scanner = new Scanner(System.in);

// Prompt the user to enter three numbers
System.out.print("Enter the first number: ");
int num1 = scanner.nextInt();
System.out.print("Enter the second number: ");
int num2 = scanner.nextInt();
System.out.print("Enter the third number: ");
int num3 = scanner.nextInt();

// Determine the largest number using if-else-if
if (num1 > num2 && num1 > num3) {
System.out.println(num1 + " is the largest number.");
} else if (num2 > num1 && num2 > num3) {
System.out.println(num2 + " is the largest number.");
} else if (num3 > num1 && num3 > num2) {
System.out.println(num3 + " is the largest number.");
} else {
System.out.println("There is a tie between the numbers.");
}

// Close the scanner
scanner.close();
}
}




//Q5:
import java.util.Scanner;

public class NumberChecker {
public static void main(String[] args) {
// Create a Scanner object to read input from the user
Scanner scanner = new Scanner(System.in);

// Prompt the user to enter a number
System.out.print("Enter a number: ");
double number = scanner.nextDouble();

// Check if the number is positive, negative, or zero
if (number > 0) {
System.out.println(number + " is a positive number.");
} else if (number < 0) {
System.out.println(number + " is a negative number.");
} else {
System.out.println("The number is zero.");
}

// Close the scanner
scanner.close();
}
}




//Q6:
public class NumberTriangle {
public static void main(String[] args) {
// Outer loop for each row
for (int i = 1; i <= 7; i++) {
// Inner loop for printing numbers in each row
for (int j = 1; j <= i; j++) {
System.out.print(j + " ");
}
// Move to the next line after each row
System.out.println();
}
}
}




//Q7:
import java.util.Scanner;

public class DiamondShape {
public static void main(String[] args) {
// Create a Scanner object to read input from the user
Scanner scanner = new Scanner(System.in);

// Prompt the user to enter the number of rows for the upper half of the diamond
System.out.print("Enter the number of rows for the diamond: ");
int rows = scanner.nextInt();

// Print the upper half of the diamond
for (int i = 1; i <= rows; i++) {
// Print leading spaces
for (int j = i; j < rows; j++) {
System.out.print(" ");
}
// Print stars
for (int k = 1; k <= (2 * i - 1); k++) {
System.out.print("*");
}
// Move to the next line after each row
System.out.println();
}

// Print the lower half of the diamond
for (int i = rows - 1; i >= 1; i--) {
// Print leading spaces
for (int j = rows; j > i; j--) {
System.out.print(" ");
}
// Print stars
for (int k = 1; k <= (2 * i - 1); k++) {
System.out.print("*");
}
// Move to the next line after each row
System.out.println();
}

// Close the scanner
scanner.close();
}
}




//Q8:
public class ArrayAverage {
public static void main(String[] args) {
// Initialize the array with given elements
int[] numbers = {10, 12, 34, 23, 56, 78};

// Variable to store the sum of the array elements
int sum = 0;

// Loop through the array to calculate the sum
for (int i = 0; i < numbers.length; i++) {
sum += numbers[i];
}

// Calculate the average
double average = (double) sum / numbers.length;

// Print the sum and average
System.out.println("Sum of array elements: " + sum);
System.out.println("Average of array elements: " + average);
}
}




//Q9:
public class ReverseArray {
public static void main(String[] args) {
// Initialize the array with the given elements
int[] numbers = {3, 4, 6, 1, 9, 7, 5, 8};

// Print the original array
System.out.print("Original Array: ");
for (int i = 0; i < numbers.length; i++) {
System.out.print(numbers[i] + " ");
}
System.out.println();

// Reverse the array
System.out.print("Reversed Array: ");
for (int i = numbers.length - 1; i >= 0; i--) {
System.out.print(numbers[i] + " ");
}
}
}




//Q10:
public class LargestElement {
public static void main(String[] args) {
// Initialize the array with the given elements
int[] numbers = {34, 23, 12, 45, 67, 89, 234, 26, 10, 30, 43};

// Assume the first element is the largest
int largest = numbers[0];

// Loop through the array to find the largest element
for (int i = 1; i < numbers.length; i++) {
if (numbers[i] > largest) {
largest = numbers[i]; // Update the largest element
}
}

// Print the largest element
System.out.println("The largest element in the array is: " + largest);
}
}