2.1.15

2D Arrays

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2D Arrays

A 2D array is the data structure which consists of an array of arrays.

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2D Array

  • A 2D array is a data structure where arrays are filled with other arrays.
  • This can be used to represent a 2D surface, or records.
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Accessing elements

  • To access an individual array, we can access the array as usual:
    • array = my2DArray[4]
  • To access an individual element, we use this syntax:
    • array[5][0]
  • This would get the first element of the sixth array.
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Applications of 2D arrays

  • 2D arrays are often used to represent a 2D surface, for example a chess board:
    • Each element of the 2D array could contain the chess piece in that location.
  • 2D arrays can be used to represent a database:
    • The outer array stores a collection of records.
    • The inner arrays store a single record.

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