Ragged arrays are useful data structures because of their memory-saving capability. For example, consider a spreadsheet with the potential for 100,000 rows by 20,000 columns.

An array is a fundamental data structure category, and a building block for more complex data structures. ... For example, in a two-element one-dimensional array of doubles, ...

An array can store a series of data values in a linear structure, with each element accessed using its index position within the data. Some data structures prevent programs from storing duplicate ...