A language with nothing up its sleeve.

Why Ascent

• Honesty over magic No truthiness, no silent overflow, no two kinds of nothing. If something happens, it's visible in the code and the result.
• Footguns caged at the source Every value is a real value — no NaN, no wild null. The dangerous thing is made impossible or made explicit, never just documented.
• Errors are the product Compiler and runtime messages are written as plain explanations that name the things you actually wrote.
• Built to transfer Mainstream syntax, clean semantics. Ascent carries you up into the languages you'll ship in — every divergence is a deliberate graduation lesson.

Start climbing

1. Chapter 1Getting Oriented The one lens you'll use for everything else: nothing happens silently.3 screens
2. Chapter 2Numbers & Math Overflow, NaN, and silent truncation: the bugs that no longer exist.5 screens
3. Chapter 3Strings Always-on interpolation, and no more pretending indexing is free.4 screens
4. Chapter 4Slots & Values fix and mut, and why nothing ever mutates in place.3 screens
5. Chapter 5Control Flow No truthiness, no ternary — if and match hand back real values.6 screens
6. Chapter 6Absence & Nothing One None instead of null-and-undefined, absence that lives in the type, and Done, void, ?? keeping nothing honest.6 screens
7. Chapter 7Functions Functions are ordinary values, signatures are always spelled out, and closures snapshot their world instead of capturing live references.4 screens
8. Chapter 8Types & Data One keyword — type — builds records, enums, and unions; construct by name, read with a dot or match, and update with with, never in place.7 screens