Brainfuck is a Turing Complete language that only has everything a programmer needs; C looks bloated compared to brainfuck. Here's some example code: ``` >,[ [ ----------[ >>>[>>>>]+[[-]+<[->>>>++>>>>+[>>>>]++[->+<<<<<]]<<<] ++++++[>------<-]>--[>>[->>>>]+>+[<<<<]>-],< ]> ]>>>++>+>>[ <<[>>>>[-]+++++++++<[>-<-]+++++++++>[-[<->-]+[<<<<]]<[>+<-]>] >[>[>>>>]+[[-]<[+[->>>>]>+<]>[<+>[<<<<]]+<<<<]>>>[->>>>]+>+[<<<<]] >[[>+>>[<<<<+>>>>-]>]<<<<[-]>[-<<<<]]>>>>>>> ]>>+[[-]++++++>>>>]<<<<[[<++++++++>-]<.[-]<[-]<[-]<]<, ] ``` Beautiful, I know. But, this doesn't teach you how it works. That's what this post is going to change. ``` + : Increments the value at the current cell by one. - : Decrements the value at the current cell by one. > : Moves the data pointer to the next cell (cell on the right). < : Moves the data pointer to the previous cell (cell on the left). . : Prints the ASCII value at the current cell (i.e. 65 = 'A'). , : Reads a single input character into the current cell. [ : If the value at the current cell is zero, skips to the corresponding ] . Otherwise, move to the next instruction. ] : If the value at the current cell is zero, move to the next instruction. Otherwise, move backwards in the instructions to the corresponding [ . ``` `Above taken from https://learnxinyminutes.com/docs/brainfuck/` Ok, looks easy right? Here's how you write hello world: ```+++++++ [ > ++++++++++ < - ] > ++ . ``` Actually this just prints H because writing hello world would take me 20 hours to type. First, we increment cell 1 to 7. Then we move to cell 2, enter the loop, and increment it 10 times. We go back to cell 1 and decrement it once. This happens 7 times. When the loop is done, cell 1 is at 0, cell 2 is at 60. The loop is done, so we increment cell #2 by 2, making it 72. the . then prints the current cell, which is 72, which is also the ascii value for H Easy right?