5
Designed by  User:Fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 

Appeared in  2024 
Memory system  Basically Everything 
Computational class  Turing complete 
Major implementations  Coming Soon 
Dialects  15, 35 
File extension(s)  .5 , .five 
5 is an esolang by User:Fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff that is based off the simple fact that 1 = 5. Some programming languages such as Forte support this functionality, but 5 dials it up to 55. Every digit 1 is replaced by the digit 5, even in the program counter. It contains an accumulator, however it also has a queue and a control stack.
Commands
Command  What it does do 

number 
set accumulator to number 
« 
digitwise left shift by 1 (decimal) 
» 
digitwise right shift by 1 
+ 
increment accumulator 
² 
square accumulator. 
³ 
cube accumulator 
! 
skip next command if accumulator is 0 
? 
Enqueue the accumulator 
 
decrement accumulator 
{ 
push the pc on the stack 
 
pop the stack 
} 
pop the stack and jump to it 
~ 
bitwise not 
[ 
jump to matching ]

* 
rotate queue left 
^ 
rotate queue right 
, 
count the 5's in the accumulator 
; 
skip next 
If the accumulator is less than 0, dequeue the top element and set to the accumulator.
Variants
15
15 (or 55) is just 5 with I/O and comments
Comments are in parentheses.
comments are removed before executing
`string`
prints out string.
``
prints a newline
# output number @ input $ output char
35
35 is 15 without the 1 = 5 Rule. Backslashes apply the 1 = 5 rule for one instruction.
Programs
Hello, World!
35
`Hello, World!`
Truthmachine
15
;_@{#!}
35
@{#!}
Computation class
You can compile ALWCIDFEC into 5, so 5 is turing complete.
Start with ???
Cellbased instructions
+ ::= «+ * ::= *«+^ 4 ::= ^«+*  ::= » / ::= *»^ 1 ::= ^»*
15 & 35
Since 15 and 35 are supersets of 5, they are turing complete as well.
Loops
brackets can be made like this:
!;[{code!};]
Categories
While 5 has no IO, 15 and 35 do.