index.md

---

title: Floor
slug: WebAssembly/Reference/Numeric/Floor

---

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The floor instructions, are used for getting the value of a number rounded down to the next integer.

floor differs from trunc when used on negative numbers, floor will round down in those cases while trunc will round up.

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Syntax

;; load a number onto the stack
f32.const -2.7

;; round down
f32.floor

;; the top item on the stack will now be -3

Instruction	Binary opcode
f32.floor	0x8e
f64.floor	0x9c