NAME : SAMULA UDAYA SINDHU
Simple Calculator Application: Develop a basic calculator application that performs
addition, subtraction, multiplication, and division.
PROGRAM
import java.util.Scanner;
public class Main
{
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("Simple Calculator");
System.out.println("✮-✮-✮-✮-✮-✮-✮-✮-✮");
System.out.print("Enter the first number: ");
double num1 = scanner.nextDouble();
System.out.print("Enter the second number: ");
double num2 = scanner.nextDouble();
System.out.println("Choose an operation:");
System.out.println("1. Addition (+)");
System.out.println("2. Subtraction (-)");
System.out.println("3. Multiplication (*)");
System.out.println("4. Division (/)");
System.out.print("Enter your choice (1-4): ");
int choice = scanner.nextInt();
double result = 0;
boolean valid = true;
switch (choice) {
case 1:
result = num1 + num2;
break;
case 2:
result = num1 - num2;
break;
case 3:
result = num1 * num2;
break;
case 4:
if (num2 != 0) {
result = num1 / num2;
} else {
System.out.println("Error: Division by zero is not allowed.");
valid = false;
}
break;
default:
System.out.println("Error: Invalid choice. Please enter a number between 1 and
4.");
valid = false;
break;
}
if (valid) {
System.out.println("The result is: " + result);
}
scanner.close();
}
}
OUTPUT
Palindrome Checker: Write a program to check if a given string is a palindrome (reads
the same forwards and backwards).
PROGRAM
import java.util.Scanner;
public class Main
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
System.out.println("Palindrome Checker");
System.out.println("✮-✮-✮-✮-✮-✮-✮-✮-✮");
System.out.print("Enter a string: ");
String input = scanner.nextLine();
String cleanedInput = input.replaceAll("[^a-zA-Z0-9]", "").toLowerCase();
boolean isPalindrome = isPalindrome(cleanedInput);
if (isPalindrome) {
System.out.println("The string is a palindrome.");
} else {
System.out.println("The string is not a palindrome.");
}
scanner.close();
}
private static boolean isPalindrome(String str) {
int left = 0;
int right = str.length() - 1;
while (left < right) {
if (str.charAt(left) != str.charAt(right)) {
return false;
}
left++;
right--;
}
return true;
}
}
OUTPUT
Number Guessing Game: Create a simple number guessing game where the program
generates a random number and the user tries to guess it.
PROGRAM
import java.util.Random;
import java.util.Scanner;
public class Main
{
public static void main(String[] args) {
Random random = new Random();
Scanner scanner = new Scanner(System.in);
int num = random.nextInt(100) + 1;
int guess = -1;
int count = 0;
System.out.println("Number Guessing Game");
System.out.println("✮-✮-✮-✮-✮-✮-✮-✮-✮");
System.out.print("Guess the number (between 1 and 100): ");
while (guess != num) {
guess = scanner.nextInt();
count++;
if (guess > num) {
System.out.println("Lower than this");
} else if (guess < num) {
System.out.println("Greater than this");
} else {
System.out.println("Finally......! You got it");
System.out.println("You guessed it in " + count + " attempts.");
}
if (guess != num) {
System.out.print("Guess again: ");
}
}
scanner.close();
}
}
OUTPUT
