(FOuRTH-generation language) A high-level programming language created by Charles Moore in the late 1960s as a way of providing direct control of the computer. Its syntax resembles LISP, it uses reverse polish notation for calculations, and it is noted for its extensibility.
: CONV ( n) 32 - 5 9 * / . ." Celsius : USER_INPUT ." Enter Fahrenheit " CONV ;
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