That work with PJSF
:0\g,:94+`#@_1+
0"!dlrow olleH">:#,_$@
v v<<<<<<<<<<
0123456789
^?^
^ <
#
> ?#^?^
\#^ ?< > ^
$ :^ <
^#_#v
1+*a<v
> :. v +1\ <
v,k7"Number "< >a".gib ooT"9k, ^
>:." :sseug"7k,\:&w" ylnO"5k,$. a" !sesseug"ak,@
>a".llams ooT"bk,^
> v
>;#"Type a number: "<;>:#,_v @Get first number
v <
> v
>&^>;#"Type another: "0<;>:#,_v @Get second number
v <
>$&+.v @get rid of extra 0, add two numbers and output
q @Quit
or:
<+_v#:&,><@,>' a.$<@,Type numbers until you get bored, then type 0 (zero). It will output the sum.