Noc language is based on the concatenative paradigm, this paradigm is based on the function composition in which we compose several functions to construct a more complex function, for instance:

[Applicative language]
y = foo(x)
z = bar(y)
w = baz(z)

[Concatenative language]
foo bar baz

Noc is also stack-based so the expressions can be easily evaluated thanks to the stack machine, when we write an expression is pushed in an stack instead of processus registers. Consequently, Noc use the Reverse polish notation for evaluate expressions, it’s the most used notation when we compose functions.

Infix     Postfix (reverse polish notation)
5 + 6     5 6 +