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Day1.java
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Day1.java
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// Day1.java
public class Day1 {
// Entry point of the program
public static void main(String[] args) {
// 1. Print "Hello, World!"
System.out.println("Hello, World!");
// 2. Basic Arithmetic Operations
int num1 = 10;
int num2 = 5;
System.out.println("Addition: " + (num1 + num2));
System.out.println("Subtraction: " + (num1 - num2));
System.out.println("Multiplication: " + (num1 * num2));
System.out.println("Division: " + (num1 / num2));
// 3. Check if a number is even or odd
int number = 7;
if (number % 2 == 0) {
System.out.println(number + " is even.");
} else {
System.out.println(number + " is odd.");
}
// 4. Simple Calculator
int a = 20;
int b = 4;
char operator = '+';
switch (operator) {
case '+':
System.out.println("Addition: " + (a + b));
break;
case '-':
System.out.println("Subtraction: " + (a - b));
break;
case '*':
System.out.println("Multiplication: " + (a * b));
break;
case '/':
System.out.println("Division: " + (a / b));
break;
default:
System.out.println("Invalid operator");
}
// 5. Find the Largest of Three Numbers
int numx = 12, numy = 25, num3 = 9;
int largest;
if (numx >= numy && numx >= num3) {
largest = numx;
} else if (numy >= numx && numy >= num3) {
largest = numy;
} else {
largest = num3;
}
System.out.println("The largest number is " + largest);
// 6. Loops
// For loop example
System.out.println("For Loop:");
for (int i = 0; i < 5; i++) {
System.out.println(i);
}
// While loop example
System.out.println("While Loop:");
int i = 0;
while (i < 5) {
System.out.println(i);
i++;
}
}
}