In a binary number like 0b01000001 we first say it is binary with 0b, then we start with 0. Why do we start with zero?
Computers work in groups of bits, so you'll often see multiples of 8, 16, 32, 64, etc. The previous number was displayed as a byte (8 bits).
| Unit |
Size |
| bit |
1 bit |
| byte |
8 bits |
| 4 bytes |
32 bits |
| 8 bytes |
64 bits |
| Kilobyte (KB) |
1024 bytes |
| Megabyte (MB) |
1024 KBs (1,048,576 bytes) |
| Gigabyte (GB) |
1024 MBs (1,073,741,824 bytes) |
| Terabyte (TB) |
1024 GBs (1,099,511,627,776 bytes) |
| Petabyte (PB) |
1024 TBs (1,125,899,906,842,624 bytes) |
| Exabyte (EB) |
1024 PBs (1,152,921,504,606,846,976 bytes) |
You should be able to recreate this chart from memory (without the exact byte count for Megabytes and beyond).