What is the main characteristic that differentiates volatile from non-volatile memory?

Volatile memory is primarily characterized by its dependence on power to maintain data. This means that when power is lost or turned off, any information stored in volatile memory is erased. This characteristic is essential for understanding how different types of memory function within computing devices.

In contrast, non-volatile memory retains its data even when the power supply is cut off, allowing for permanent storage of information. This is crucial for applications where data must be preserved across power cycles, such as with hard drives and flash memory.

The ability of volatile memory to lose all stored data when power is removed is a fundamental aspect that defines its role in computer systems, primarily used for temporary storage during processing tasks. Understanding this characteristic helps clarify the different uses and applications of various memory types in technology.