# array_length_2d

## Returns the length of a given dimension of a 2D
array.

### Syntax:

array_length_2d(array, n);

Argument |
Description |

array |
The array to check. |

n |
The entry of the array to get the length of. |

**Returns:** Real

### Description

With this function you can get the length (number of entries) of
a the second dimension of an array. You supply the entry number for
the first dimension and the function will return the number of
second dimension entries that the array has (to find the length of
the first dimension use the function `array_height_2D`). The function
will return 0 if the variable given is not an array or is a 1D
array.

### Example:

for (var i = array_height_2d(a) - 1; i > -1;
i--;)

{

for (var j = array_length_2d(a, i) - 1; j >
-1; j--;)

{

a[i, j] = -1;

}

}

The above code will loop through a 2D array and set each entry
to -1.

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