Wrong code, bug or interpretation fails? (Help me --> Java While test)

Question

It's the instruction: ============

Your math teacher asked you to calculate the sum of the numbers 1 to N, where N is a given number.
-- Task: Take an integer N from input and output the sum of the numbers 1 to N, inclusive.

Sample Input: 10
Sample Output: 55

It's my code: =============

import java.util.Scanner;
public class Program {
public static void main(String[] args) {

Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
int x = 0;

do{
x++;
} while(x < n);
System.out.println(x);
}
}

It's the result: ============
Input: 4
Your Output: 4
Expected Output: 10

I really have no idea about how to receive the "Expected output", it's not a VAR... It's an aleatory number.

Answer 1

// Bro this will work

import java.util.Scanner;
public class Program
{
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
int x=0;
int sum =0;
do{
sum += x;
x++;
}
while(x<=n);
System.out.println(sum);
}
}

Answer 2

You are just incrementing value of x but not adding current value of x (1,2,3,4.....10) in another variable which might be 'total' or 'sum'

Answer 3

import java.util.*;
class Main{
public static void main(String[] args){
Scanner scn=new Scanner(System.in);
int x=scn.nextInt();
int n=1;
int sum=0;
do{
sum+=n;
n++;
}while(n<=x);
System.out.println(sum);
}
}

Answer 4

Beta you are just incrementing x
You need to initialise new variable
Ex
int sum = 0;
sum = sum + x++;

Answer 5

And it should be like this
While (x <= 10)
This will add frim 0 to 10 but if you write
While (x<10) it will add up to 9

Answer 6

Bro tomorrow I will solve for you

Answer 7

Try it bro it will work

Answer 8

Inside while loop compare
x <= n

Answer 9

Thank you so much, AJ, Vinay and Dennis.
-- Unfortunately, even changing the code as you teach me i'm still gotting error :(

========================== CODE
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
int x = n;
int sum = 0;

do{
sum = sum + x++;
} while(sum <= x);

System.out.println(sum);

========================== ERROR

------- Test Case 1
Input: 4
Your Output: 9
Expected Output: 10

------- Test Case 2
Input: 42
Your Output: 85
Expected Output: 903

-------------------------------- Any suggestions :?

Answer 10

Thank you so much Vinay, it doesn't work.
Anyway, I will study a litle more before back to this test.

I understood my error and your vision to help me but there is a bug to accept my code.

Answer 11

Thank you Vinay, it really works! ^^

I needs to understand a litle more about this kind of problem :(

Thank you so much!!

Answer 12

Thank you Vikas, now I have learned one more ✌️😊

Answer 13

Follow us

Answer 14

import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new
Scanner(System.in);
{ int num = sc.nextInt(), i = 1, sum = 0; while(i <= num) { sum += i; i++; }
System.out.println(sum); } }
}

Working 100%