[Glossary](https://useratio.app/glossary) › Developer terms

# Fixed-width integers (u8, i64)

Whole numbers stored in a set number of bits. u8 is unsigned 8-bit, i64 is signed 64-bit.

A u8 holds 0 to 255. Put 300 in and it wraps around to 44. A negative number in an unsigned type shows its two's-complement pattern. Ratio shows what the type would hold.

## In Ratio

| You type | Ratio shows |
| --- | --- |
| `300 in u8` | 44 |
| `-1 in hex u8` | 0xFF |

## Related

[Hexadecimal](https://useratio.app/glossary/hexadecimal) · [Bitwise operators](https://useratio.app/glossary/bitwise) · [All terms](https://useratio.app/glossary)

[Try Ratio free for 7 days](https://useratio.app/download)

Source: https://useratio.app/glossary/fixed-width-integer