A stack-based language. It supports eval, user input, loops, and basic math. It was designed by iovoid.
"starts and end pushing to stack
!prints the first element of stack, deleting it
*multiply the two first elements of stack, deleting the originals
/will divide the first element of stack with the seccond, deleting the originals
+will add two first elements of stack, deleting the originals
-will remove the first element of stack with the seccond, deleting the originals
[starts a loop
]ends a loop
~breaks from a loop
?break if the first element of stack is 0
#break if the length of stack is 1 or 0
.pop first element of the stack
%adds a random item to the stack, from 1 to 255
$push the length of the stack
_replace first item of stack with it converted to a string, if impossible return the original
&eval the concatenation of all elements in the stack, replaces stack with output
,take a line of input from stdin
^push the program code to the stack
|actually print the output (! is still needed)
=end the program
What's done here? First, " opens the pushing of items to stack (H,e,l,l,o,...), later " closes it. Inside a loop, every item of the stack is printed until its empty.
Other Hello World!
Here, the / is purposefully eaten by [!#] that will ignore the last character
REPL (Read-Eval-Print Loop)
Here, input is asked with , and then & evals it. Later a [!#] prints everything, like in Hello, World!.
^& will repeat the program by eval-ing itself
In Node.JS, by iovoid: https://gist.github.com/io4/c82798e6dfd918e37fe11f67283184a7