Cookbook

Examples

Small, complete programs. Copy one into a .sym file and run it with sigil run or symc < prog.sym > prog.

hello.sym

((hello, world\n)) > @screen
!!

The whole ceremony: text, flow, halt.

fizz.sym

1 > ~$i
?[$i -= 15]{
    $i --- 3 > ~$m3
    $i --- 5 > ~$m5
    ?[$m3 == 0]{ ((Fizz\n)) > @screen } -?{
    ?[$m5 == 0]{ ((Buzz\n)) > @screen } -?{
        :wrint { [$i] } ! }}
    $i + 1 > ~$i
}?
!!

Loops, modulo, and else-if ladders.

fib.sym

:fib { [i64:$n] }
    ?[$n --= 2]{ $n >!? }
    $n - 1 > ~$a  :fib { [$a] } ! > ~$lo
    $n - 2 > ~$b  :fib { [$b] } ! > ~$hi
    $lo + $hi >!?
:fib { [10] } ! > ~$r
:wrint { [$r] } !   ::: 55

A recursive function calling itself.

echo.sym

:rdall { } ! > ~$buf
:ld64 { [$buf] } ! > ~$len
0 > ~$i
?[$i --= $len]{
    :ld8 { [$buf + 8 + $i] } ! > ~$c
    :wrch { [$c] } !
    $i + 1 > ~$i
}?
!!

Read all of stdin and write it back.