Adding values to a C# array

Probably a really simple one this - I'm starting out with C# and need to add values to an array, for example:

int[] terms;

for(int runs = 0; runs < 400; runs++)
{
terms[] = runs;
}

For those who have used PHP, here's what I'm trying to do in C#:

$arr = array();
for ($i = 0; $i < 10; $i++) {
$arr[] = $i;
}

int[] terms = new int[400];

for(int runs = 0; runs < 400; runs++)
{
terms[runs] = value;
}

int ArraySize = 400;

int[] terms = new int[ArraySize];


for(int runs = 0; runs < ArraySize; runs++)
{

terms[runs] = runs;

}

That would be how I'd code it.

You have to allocate the array first:

int [] terms = new int[400]; // allocate an array of 400 ints
for(int runs = 0; runs < terms.Length; runs++) // Use Length property rather than the 400 magic number again
{
terms[runs] = value;
}

C# arrays are fixed length and always indexed. Go with Motti's solution:

int [] terms = new int[400];
for(int runs = 0; runs < 400; runs++)
{
terms[runs] = value;
}

Note that this array is a dense array, a contiguous block of 400 bytes where you can drop things. If you want a dynamically sized array, use a List<int>.

List<int> terms = new List<int>();
for(int runs = 0; runs < 400; runs ++)
{
terms.Add(runs);
}

Neither int[] nor List<int> is an associative array -- that would be a Dictionary<> in C#. Both arrays and lists are dense.

int[] terms = new int[10]; //create 10 empty index in array terms

//fill value = 400 for every index (run) in the array
//terms.Length is the total length of the array, it is equal to 10 in this case
for (int run = 0; run < terms.Length; run++)
{
terms[run] = 400;
}

//print value from each of the index
for (int run = 0; run < terms.Length; run++)
{
Console.WriteLine("Value in index {0}:\t{1}",run, terms[run]);
}

Console.ReadLine();


>/*Output：

>Value in index 0: 400
<br/>Value in index 1: 400
<br/>Value in index 2: 400
<br/>Value in index 3: 400
<br/>Value in index 4: 400
<br/>Value in index 5: 400
<br/>Value in index 6: 400
<br/>Value in index 7: 400
<br/>Value in index 8: 400
<br/>Value in index 9: 400
<br/>*/