How do you use the Array.GetLength function in C#?
What is the difference between the Length property and the GetLength function?
+16
A:
GetLength takes an integer that specifies the dimension of the array that you're querying and returns its length. Length property returns the total number of items in an array:
int[,,] a = new int[10,11,12];
Console.WriteLine(a.Length); // 1320
Console.WriteLine(a.GetLength(0)); // 10
Console.WriteLine(a.GetLength(1)); // 11
Console.WriteLine(a.GetLength(2)); // 12
Mehrdad Afshari
2010-01-11 20:12:14
And on one-dimensional arrays `Length` will return the same value as `GetLength(0)`.
0xA3
2010-01-11 20:13:19
Why is a.GetLength(2) 11 and not 12?
Mike Pateras
2010-01-11 20:22:22
@Mike: Cause 1 and 2 are a single key away.
Mehrdad Afshari
2010-01-11 20:30:54
+2
A:
GetLength returns the length of a specified dimension of a mulit-dimensional array.
Length returns the sum of the total number of elements in all the dimensions.
- For a single-dimensional array, Length == GetLength(0)
- For a two-dimensional array, Length == GetLength(0) * GetLength(1)
etc.
Jason Williams
2010-01-11 20:14:00
Not quite true: Two dimensional arrays: Length = GetLength(0) * GetLength(1)
Mehrdad Afshari
2010-01-11 20:16:12
That's a clever typo! How did I manage to transpose + and * ?! (fixed)
Jason Williams
2010-01-11 20:43:09