Explain what this code snippet does $($be as simple as concise as

possible$).$ Note that $r0$ stores the input variable $(n)$ for this code,

and $r2$ is the output.

MOV r$2,$ #$1$

MOV r$1,$ #$1$

loop CMP r$1,$ r$0$

BGT done

MUL r$2,$ r$1,$ r$2$

ADD r$1,$ r$1,$ #$1$

B loop

done B done