How to create and use array in Unity using C#

28 Jul 2020 · 1 min read

Features of builtin array in Unity

Fixed size once it is created, which means you can't add items to it or remove items from it
All elements are the same type
Type safe, program will read the data from memory in the way it was originally stored.
Efficient in terms of memory and performance (the memory address are contiguous)

// define an empty array
float[] values;

// define an array length equal 5
int[] values = new int[5];

// define a 3-demension array
int[,,] values = new int[10,20,30];

// define an array with values
int[] values = new int[] {1, 2, 3, 4}

// get the array length
Debug.Log(values.Length);

If you want an array which has a flexible length, you can use List and ArrayList.