How to assign number to two dimentional array?

Hello.
I want to assign number to 2dimentional array .
But seems like this code is not working.
Please teach me how to fix.Thank you!

var MyArray : [][]int = array{array{}}
if(set MyArray[3][3] = 1){}

Use TArray

TArray<TArray<int>> MyArray = TArray<TArray<int>> ();

// Add element to 2-dimentional array

TArray<int> temp =  TArray<int>();
temp.Add(1);
MyArray.Add(temp);

// Access Element

int FirstElement = MyArray[0][0];