Const

The const instructions, are used to declare numbers.

Try it

(module
  (import "console" "log" (func $log (param i32)))
  (func $main

    i32.const 10 ;; load a number onto the stack
    call $log ;; log the number

  )
  (start $main)
)

const url = "{%wasm-url%}";
await WebAssembly.instantiateStreaming(fetch(url), { console });

Syntax

wasm

;; push `5` onto the stack
i32.const 5

Instruction	Binary opcode
`i32.const`	`0x41`
`i64.const`	`0x42`
`f32.const`	`0x43`
`f64.const`	`0x44`