index.md

---

title: Left shift
slug: WebAssembly/Reference/Numeric/Left_shift

---

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The shl instructions, short for shift-left, are used for performing a bitwise left-shift, similar to the << operator in other languages.

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Syntax

;; load two numbers onto the stack
i32.const 7   ;; 00000111
i32.const 1   ;; left shift one spot

;; perform a bitwise left-shift
i32.shl

;; the top item on the stack will now be 14 (00001110)

Instruction	Binary opcode
i32.shl	0x74
i64.shl	0x86