Registers in a CPU are used to:

Registers in a CPU are small, high-speed storage locations that hold data temporarily during processing tasks. They are utilized for holding instructions, operands, and intermediate results that the CPU is currently working on. This allows the CPU to access and manipulate data much more quickly than if it were to retrieve it from the main memory (RAM) every time it needed to perform an operation.

The purpose of registers is to provide the CPU with fast access to essential data needed for executing instructions, which speeds up overall processing. For instance, when performing arithmetic calculations, the CPU will load the numbers into registers, perform the operation, and store the result back in a register before moving it to memory if needed. This efficiency is crucial for the CPU to operate effectively and maintain high performance during processing tasks.