Write a function to print the sum of all odd numbers from 1 to n.
import java.util.*;
public class Solutions {
public static void printSum(int n) {
int sum = 0;
for(int i=1; i<=n; i++) {
if(i % 2 != 0) {
sum = sum + i;
}
}
System.out.println(sum);
}
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
printSum(n);
}
}
Find the maximum & minimum number in an array of integers.
[HINT : Read about Integer.MIN_VALUE & Integer.MAX_VALUE in Java]
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”