c# levels question

Question

using System;
using System.Collections.Generic;

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
int levels = Convert.ToInt32(Console.ReadLine());

Console.WriteLine(Points(levels));
}

static int Points(int levels)
{
int sum = 0 ;
//your code goes here
for(int i=1;i<=levels;i++)
{
int sum =+ i;

}return sum;

}

}

}
whats wrong ?

Answer 1

=+ should be +=
You are redeclaring sum variable. Just remove ‘int’ inside for loop

Answer 2

the variable sum is duplicating
remove variable declared in the loop and continue with a variable declared outside of the loop and inside of the constructor