FALSE is a [[stack-based language]] with single-character commands and variables.<ref>{{cite web |url=http://strlen.com/false/ |title=The FALSE Programming Language |last1=van Oortmerssen |first1=Wouter |publisher=Self-published |access-date=11 February 2016}}</ref> For example, 3 + 1 can be calculated by evaluating (λ x → x + 1)(3):