what is bit, byte, kilobyte?

A bit (short for binary digit) is the smallest unit of data in a computer. A bit has a single binary value, either 0 or 1.


and one bit is a single binary value of 1 or 0

Byte = 8 bits
Kilobyte = 1024 Megabytes
Megabyte = 1024 Kilobytes
Gigabyte = 1024 Megabytes
Terabyte = 1024 Gigabytes
Petabyte = 1024 Terabytes
Excabyte = 1024 Petabytes