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π in Prolog
AmazingMech2418 (1043)

Here is a new addition to my series of pi approximations! This one is in Prolog!

Here are the other approximations so far:
Haxe - https://replit.com/talk/share/p-in-Haxe/133103
Objective-C - https://replit.com/talk/share/p-in-Objective-C/117733
Pascal - https://repl.it/talk/share/p-in-Pascal/115831
D - https://repl.it/talk/share/p-in-D/42887
Scala - https://repl.it/talk/share/p-in-Scala/42025
Reason - https://repl.it/talk/share/p-in-Reason/42012
Tcl - https://repl.it/talk/share/p-in-Tcl/41996
C++ - https://repl.it/talk/share/p-in-C/41882
TypeScript - https://repl.it/talk/share/p-in-TypeScript/41874
CoffeeScript - https://repl.it/talk/share/p-in-CoffeeScript/41867
Elisp - https://repl.it/talk/share/p-in-Emacs-Lisp-Elisp/41846
Clojure - https://repl.it/talk/share/p-in-Clojure/41845
Scheme - https://repl.it/talk/share/p-in-Scheme/41844
Erlang - https://repl.it/talk/share/p-in-Erlang/41652
Elixir - https://repl.it/talk/share/p-in-Elixir/41530
Julia - https://repl.it/talk/share/p-in-Julia/41395
Nim - https://repl.it/talk/share/p-in-Nim/41372
PHP - https://repl.it/talk/share/p-in-PHP/41348
Crystal - https://repl.it/talk/share/p-in-Crystal/41276
F# - https://repl.it/talk/share/p-in-F/41261
Lua - https://repl.it/talk/share/p-in-Lua/41251
Dart - https://repl.it/talk/share/p-in-Dart/41240
R - https://repl.it/talk/share/p-in-R/41205
Haskell - https://repl.it/talk/share/p-in-Haskell/41199
Raku - https://repl.it/talk/share/p-in-Raku/41111
Rust - https://repl.it/talk/share/p-in-Rust/41056
Go - https://repl.it/talk/share/p-in-Go/40950
Swift - https://repl.it/talk/share/p-in-Swift/36150
C# - https://repl.it/talk/share/p-in-C/36141
Bash - https://repl.it/talk/share/p-in-Bash/36133
Kotlin - https://repl.it/talk/share/p-in-Kotlin/36125
Ruby - https://repl.it/talk/share/p-in-Ruby/34982
Java - https://repl.it/talk/share/p-in-Java/34978
QBasic - https://repl.it/talk/share/p-in-QBasic/34973
Fortran - https://repl.it/talk/share/p-in-Fortran/34890
APL - https://repl.it/talk/share/p-in-APL/34888
Forth - https://repl.it/talk/share/p-in-Forth/34652
LOLCODE - https://repl.it/talk/share/p-in-LOLCODE/34421
Python and Node.js (Node is linked in post) - https://repl.it/talk/share/2-Approximations-of-p-In-Only-Four-Lines-of-Code/32773
C - https://repl.it/talk/share/p-Approximations-in-C/33461

Credit to @NoelB33 @TheForArkLD , @Warhawk947 , and @LizFoster for inspiring these approximations. Most of these use the Nilakantha Series, although I also use the arctangent method (multiplying the radian arctangent of 1 by 4 to get pi and getting the arctangent with an infinite series) in three of them (Python, Node, and C).

This series is mostly over, but if I learn a new programming language that has floating point capabilities, get ready for a new addition! I have learned Assembly (GAS and NASM), BrainF, and Quil, but these ones don't support floating point in an easy-enough way. LOL! If Repl.it adds COBOL, I am definitely looking forward to that one! Also, maybe Vlang next? Let me know what you think!

Also, I'm planning on making a powerful compiled language called Peregrine soon and an object-oriented variant called Falcon and will make pi approximations in both to add to the series!

Ideas for the next ones: E, F, Vlang, Ada, Racket, and Zig

Thank you to @Scoder12 for trying to answer a question of mine with this and for providing me with Method 2 of running my Prolog program.

By the way, Prolog is an interesting language! It basically runs almost like a math equation, the way I put it. Basically, you tell the compiler/interpreter what all is considered to be true, and it figures out the values of undefined variables that are needed for it to be true and processes the variables in that way. Using this, it also makes it into a functional programming language as well, just an unconventional one! Also, this means you can't reuse variables within a function.

Comments
hotnewtop
AmazingMech2418 (1043)

@DynamicSquid Thank you! :D And I will do Rex if we actually finish it. LOL!

DynamicSquid (4627)

@AmazingMech2418 lol! Well keep up the good work! You can never get enough of pi!

AmazingMech2418 (1043)

Updates: I cannot do E since it won't compile on Repl.it. Also, I won't do F because it is basically just modified Fortran.

AmazingMech2418 (1043)

Also, the Racket installer is too large for Repl.it.