Less than

The lt instructions, short for less than, check if a number is less than another number. If the first number is less than the second number equal 1 will be pushed on to the stack, otherwise 0 will be pushed on to the stack.

The integer types have separate less than instructions for signed (lt_s) and unsigned (lt_u) numbers.

;; load 2 numbers on to the stack
local.get $num
i32.const 2

;; check if $num is less then '2'
i32.lt_u

;; if $num is less than the `2`, `1` will be pushed on to the stack,
;; otherwise `0` will be pushed on to the stack.