How do I put this "Series (0-N): 1 2 3 4 5" in...

Question

This are the content..

Display the following number patterns:
> Enter a Value: 5
> Series (0-N): 1 2 3 4 5
> Sum of Series: 15

I already finished the input of 5 and output of 15..I just can't figure out how to code that "Sum of Series..." need a help =)

Answer 1

Inz - This is your required code. If you like it, please upvote it.

import java.util.*;
public class Series {
public static void main(String args[]) {
int i,n,s=0;
System.out.print("Enter a Value: ");
n=(new Scanner(System.in)).nextInt();
System.out.print("Series (0-N): ");
for(i=1;i<=n;i++){
System.out.print(i+" ");
s+=i;
}
System.out.print("\nSum of Series: "+s);
}
}

Answer 2

Define a sum variable initialised to 0. then use a for loop and for each iteration add the current number to the sum variable.

If you do not want to use a loop, the most effective method is to use the Gaussian sum formula
sum_n=n(n+1)/2

Answer 3

import java.util.Scanner;

public class Main {
public static void main (String[] args) {
Scanner sc = new Scanner(System.in);
int userNumber = -1;
int sum=0;

while (userNumber < 1) {
System.out.println("Enter a Value: ");
userNumber=sc.nextInt();
}
for (int number = 1; number <= userNumber; number++)
{ sum = sum + number; }

System.out.println("The sum of Series from 1 to " + userNumber + " is " + sum);
}
}

Answer 4

I think it wants to show the "numbers" how it becomes the sum like 1 2 3 4 5. Is there a way to show that in the program?

Answer 5

Wow! Its done now. Thanks a lot. Appreciated.

Answer 6

Oh sorry. Ok wait..I'm writing it now

Answer 7

_p.r.o.g.r.a.m.m.e.r.05_ - your code is better 'coz its simplified, I hope I read it sooner 😅 'coz I was away for few days. Anyways thanks for sharing your work.

Answer 8

This is the complete version of the program I made with the help of some people in this thread.

import java.util.Scanner;

public class Main {
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
int userNumber = -1;
int sum = 0;

while (userNumber < 1) {
System.out.print("Enter a Value: ");
userNumber = sc.nextInt();
}
System.out.print("Series (0-N): ");
for (int number = 1; number <= userNumber; number++) {
sum = sum + number;
System.out.print(" " + number);
}
System.out.print(System.lineSeparator());
System.out.print("Sum of Series: " + sum);
}
}