index.md

---

title: Store
slug: WebAssembly/Reference/Memory/Store

---

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The store instructions, are used to store a number in memory.

For the integer numbers, you can also store a wide typed number as a narrower number in memory, e.g. store a 32-bit number in an 8-bit slot (i32.store8). If the number doesn't fit in the narrower number type it will wrap.

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Syntax

;; the offset in memory where to store the number
i32.const 0

;; the number to store
i32.const 20

;; store 20 at position 0
i32.store

Instruction	Binary opcode
i32.store	0x36
i64.store	0x37
f32.store	0x38
f64.store	0x39
i32.store8	0x3a
i32.store16	0x3b
i64.store8	0x3c
i64.store16	0x3d
i64.store32	0x3e