Why it doesn't work

Question

static void Main(string[] args)
{
int[] x = new int[100];
for (int k=0 ; k < x.Length; k++)
{
x[k] = k;
}
Console.WriteLine(x.Sum());
}

In this code I want to find the sum of 1 to 100
But it's not matter to write k = 0 or k = 1
It will find the sum of 1 to 99
What is wrong

Answer 1

Sami Jabin
Because of the condition k < x.Lenght

1) The lenght is 100, so k will always stop at 99, so you could make it to k < x.Lenght + 1, and get the correct result

2) either k starts with 0 or 1, it will be the same result. 1 + 2 + 3 + .. is the same as 0 + 1 + 2 + 3+ ..

Answer 2

x[k] = k+1;

Answer 3

Because your array containing values from 0 to 99

static void Main(string[] args)
{
int[] x = new int[100];
for (int k=1 ; k <= x.Length; k++)
{
x[k-1] = k;
}
Console.WriteLine(x.Sum());
}

Answer 4

Sami Jabin again, because of the condition k < x.Lenght

Since the lenght is 100, then k must be 99. In other words, strictly less than 100.

If you want it to go from 1 to 100 included also, just change it to k <= x.Lenght. This will let your loop know that k can also be equal to 100, and you'll get the result you want

Answer 5

Aymane Boukrouh
Thank you I get it ❤️

Answer 6

My question is why k=0 and k=1 are same