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An ARRAY is a sequence of values of a given data type, arranged contiguously in memory.  Arrays are declared by following the identifier with an integer constant enclosed in [] brackets.  To declare an array of 10 floats requires:

    float    f_array[10];

Individual ELEMENTS of an array are accessed using the index in brackets.  Indexing begins at 0, so in the above example, elements f_array[0] through f_array[9] are allocated appropriately, but f_array[10] should not be accessed.

    f_array[5] = 100.;

Multi-dimensional arrays are declared using the following syntax:

    float    f_array[10] [10];

This declares a 10 by 10 array.  The indexing begins with 0 for both rows and columns.

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2.3  Arrays