BQN's documentation describes what features it has, how to use them (with examples), and why they were chosen. For a linear introduction to the language, see the tutorials. For all of the particulars without so much discussion, see the specification.
The quick start page is a hands-on way to see what features BQN offers so you can start with the parts you're most interested in.
Overview:
References:
Concepts:
Primitives:
+-×÷⋆√⌊⌈|≤<>≥=≠≡ and ⚇≢=≠! and ⎊∘○⊸⟜˘⎉◶˙⥊<⍷´˝⊔⊢⊣/∾∧∨¬¨⌜≡≢∧∨⍋⍒⋈⊑↑↓↕⍟⌽`⊐⊒∊⊏˜⊐⊒∊⍷»«≍>↑↓⍉⌾⁼⊘↕Environment: