Write a function to calculate the factorial of a number.
import java.util.*;
public class Functions {
public static void printFactorial(int n) {
//loop
if(n < 0) {
System.out.println("Invalid Number");
return;
}
int factorial = 1;
for(int i=n; i>=1; i--) {
factorial = factorial * i;
}
System.out.println(factorial);
return;
}
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
printFactorial(n);
}
}
Take an array of numbers as input and check if it is an array sorted in ascending order.
Eg : { 1, 2, 4, 7 } is sorted in ascending order.
{3, 4, 6, 2} is not sorted in ascending order.
Input an email from the user. You have to create a username from the email by deleting the part that comes after ‘@’. Display that username to the user.
Example :
email = “mejona@gmail.com” ; username = “mejona”
email = “helloWorld123@gmail.com”; username = “helloWorld123”
Write a function that takes in age as input and returns if that person is eligible to vote or not. A person of age > 18 is eligible to vote.
Take an array of Strings input from the user & find the cumulative (combined) length of all those strings.