# Byte.From

Last updated: 2026-09-09

Convert an integer to unsigned 8-bit byte with a range check.

Built into Yeho; no import is needed. These additions have Windows CPU-oracle developer-host evidence. Kyber rejects these operations; this does not qualify Starfish or other targets.

`Byte.From(integer value) -> byte`

Out-of-range values throw Error with type integer.range. No wrapping or clamping; bool, float and text are rejected.

Contract and host execution evidence: yeho/docs/runtime/hardware-host-tools.md. This small example was type checked, not executed.

## Parameters

- value (integer): An integer value from 0 through 255.

## Type-checked example

```yeho
byte value = Byte.From(42)
```

project.mech:

```toml
manifestVersion = "2"
package = "api.example.runtime__byte_from"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"
```

Source: yeho/src/compiler/common/intrinsic_registry.cpp:805