The address in a pointer in a pointer constant remains the same each time the program is run. An array is a collection of elements of the same data type. In the declaration for a fixed-length array, the size may be a constant or a variable. The first element in an array is accessed using an index of 1. Only fixed-length arrays can be initialized when they are defined. Initializer values for an array are enclosed between the symbols [and]. If the number of values provided in the initializer is fewer than the number elements in the array, the unassigned elements are filled with zeros