package com.
kunal;
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
// String fruit = in.next();
// switch (fruit) {
// case "Mango" -> System.out.println("King of fruits");
// case "Apple" -> System.out.println("A sweet red fruit");
// case "Orange" -> System.out.println("Round fruit");
// case "Grapes" -> System.out.println("Small fruit");
// default -> System.out.println("please enter a valid fruit");
// }
int day = in.nextInt();
// switch (day) {
// case 1 -> System.out.println("Monday");
// case 2 -> System.out.println("Tuesday");
// case 3 -> System.out.println("Wednesday");
// case 4 -> System.out.println("Thursday");
// case 5 -> System.out.println("Friday");
// case 6 -> System.out.println("Saturday");
// case 7 -> System.out.println("Sunday");
// }
// switch (day) {
// case 1:
// case 2:
// case 3:
// case 4:
// case 5:
// System.out.println("Weekday");
// break;
// case 6:
// case 7:
// System.out.println("Weekend");
// break;
// }
switch (day) {
case 1, 2, 3, 4, 5 -> System.out.println("Weekday");
case 6, 7 -> System.out.println("Weekend");
}
package com.kunal;
import java.util.Scanner;
public class NestedSwitch {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int empID = in.nextInt();
String department = in.next();
switch (empID) {
case 1:
System.out.println("Kunal Kushwaha");
break;
case 2:
System.out.println("Rahul Rana");
break;
case 3:
System.out.println("Emp Number 3");
switch (department) {
case "IT":
System.out.println("IT Department");
break;
case "Management":
System.out.println("Management Department");
break;
default:
System.out.println("No department entered");
break;
default:
System.out.println("Enter correct EmpID");
}
// better way to write
switch (empID) {
case 1 -> System.out.println("Kunal Kushwaha");
case 2 -> System.out.println("Rahul Rana");
case 3 -> {
System.out.println("Emp Number 3");
switch (department) {
case "IT" -> System.out.println("IT Department");
case "Management" -> System.out.println("Management Department");
default -> System.out.println("No department entered");
default -> System.out.println("Enter correct EmpID");
}
package com.kunal;
import java.util.Scanner;
public class Calculator {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
// Take input from user till user does not press X or x
int ans = 0;
while (true) {
// take the operator as input
System.out.print("Enter the operator: ");
char op = in.next().trim().charAt(0);
if (op == '+' || op == '-' || op == '*' || op == '/' || op == '%') {
// input two numbers
System.out.print("Enter two numbers: ");
int num1 = in.nextInt();
int num2 = in.nextInt();
if (op == '+') {
ans = num1 + num2;
if (op == '-') {
ans = num1 - num2;
if (op == '*') {
ans = num1 * num2;
if (op == '/') {
if (num2 != 0) {
ans = num1 / num2;
if (op == '%') {
ans = num1 % num2;
} else if (op == 'x' || op == 'X') {
break;
} else {
System.out.println("Invalid operation!!");
System.out.println(ans);
}
package com.kunal;
import java.util.Scanner;
public class CaseCheck {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
char ch = in.next().trim().charAt(0);
if (ch >= 'a' && ch <= 'z') {
System.out.println("Lowercase");
} else {
System.out.println("Uppercase");
}
package com.kunal;
public class Conditionals {
public static void main(String[] args) {
/*Syntax of if statements:
if (boolean expression T or F) {
// body
} else {
// do this
}*/
int salary = 25400;
// if (salary > 10000) {
// salary = salary + 2000;
// } else {
// salary = salary + 1000;
// }
// multiple if-else
// if (salary > 10000) {
// salary += 2000; // salary = salary + 2000
// } else if (salary > 20000) {
// salary += 3000;
// } else {
// salary += 1000;
// }
// System.out.println(salary);
int a = 10;
int b = 40;
if (a != 35) {
System.out.println("Hello World");
}
package com.kunal;
public class CountNums {
public static void main(String[] args) {
int n = 45535;
int count = 0;
while (n > 0) {
int rem = n % 10;
if (rem == 5) {
count++;
n = n / 10; // n /= 10
System.out.println(count);
}
package com.kunal;
import java.util.Scanner;
public class Fibo {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int n = in.nextInt();
int a = 0;
int b = 1;
int count = 2;
while (count <= n) {
int temp = b;
b = b + a;
a = temp;
count++;
System.out.println(b);
}
package com.kunal;
import java.util.Scanner;
public class Largest {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int a = in.nextInt();
int b = in.nextInt();
int c = in.nextInt();
// Q: Find the largest of the 3 numbers
// int max = a;
// if (b > max) {
// max = b;
// }
// if (c > max) {
// max = c;
// }
// int max = 0;
// if (a > b) {
// max = a;
// } else {
// max = b;
// }
// if (c > max) {
// max = c;
// }
int max = Math.max(c, Math.max(a, b));
System.out.println(max);
}
package com.kunal;
import java.util.Scanner;
public class Loops {
public static void main(String[] args) {
/* Syntax of for loops:
for (initialisation; condition; increment/decrement) {
// body
}*/
// Q: Print numbers from 1 to 5
// for (int num = 1; num <= 5; num += 2) {
// System.out.println(num);
// }
// print numbers from 1 to n
Scanner in = new Scanner(System.in);
// int n = in.nextInt();
// for (int num = 1; num <= n; num++) {
//// System.out.print(num + " ");
// System.out.println("Hello World");
// }
// while loops
/* Syntax:
while (condition) {
// body
}*/
// for (int num = 1; num <= 5; num += 2) {
// System.out.println(num);
// }
int num = 1;
while (num <= 5) {
// System.out.println(num);
num += 1;
}
// do while
/* do {
// body
} while (condition);
*/
int n = 1;
do {
System.out.println("Hello World");
} while (n != 1);
}
package com.kunal;
public class Reverse {
public static void main(String[] args) {
int num = 123456;
int ans = 0;
while (num > 0) {
int rem = num % 10;
num /= 10;
ans = ans * 10 + rem;
System.out.println(ans);
