index.md

---

title: Remainder
slug: WebAssembly/Reference/Numeric/Remainder

---

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The rem instructions, short for remainder, are used to calculate the remainder left over when one integer is divided by another integer, similar to the % operator in other languages. The rem instructions are only available for the integer types and not for the floating point types.

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Syntax

;; load two numbers onto the stack
i32.const 10
i32.const 3

;; calculate the remainder of dividing one number by the other
i32.rem

;; the top item on the stack will now be 1 (10 % 3 = 1)

Instruction	Binary opcode
i32.rem_s	0x6f
i32.rem_u	0x70
i64.rem_s	0x81
i64.rem_u	0x82