Toy language :)
You can see some examples in the euler directory.
1
1_000_000
1.0
1.0e+1
1_000.0
"Hello world"
[1,2,3]
(1,2,3)
<expr> <id>
1n
1 n
(1 + 1) n
<expr> id
1 print
1, 1, add, print
<tuple> <block> <id>
(n,) [ n print ] echo
(a,b) [ a + b ] add