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);
}
}
Write a program to print Fibonacci series of n terms where n is input by user :
0 1 1 2 3 5 8 13 21 .....
In the Fibonacci series, a number is the sum of the previous 2 numbers that came before it.
Input a string from the user. Create a new string called ‘result’ in which you will replace the letter ‘e’ in the original string with letter ‘i’.
Example :
original = “eabcdef’ ; result = “iabcdif”
Original = “xyz” ; result = “xyz”
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”