block statement creates a label that can later be branched out of with a
loop statement is the opposite of the
block statement, in the sense that while branching to a
loop jumps to the beginning of the loop, branching to a
block jumps to the end of the block; that is, out of the block.
;; label the block so that it can be branched to. (block $my_block ;; branch to the block. ;; most of the time you'll want to put this in an if statement and only branch on condition, ;; otherwise the following control flow are unreachable. br $my_block ;; this will never be reached, since the br jumped out of the block already. unreachable )