SLet

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SLet 4

Designed by	User:I am islptng
Appeared in	2025
Computational class	Turing-complete
Reference implementation	Python
Influenced by	GolfScript
File extension(s)	.slet

In SLet 3, the programs are too long, so the author created SLet 4!

The name is normally pronounced "slet", but it can be read as "shit" if you want.

Data types

In this esolang, there is 5 data types.

Number: Fraction. Size is unlimited. 0/0 is NaN and 1/0 is Infinity.
Boolean: true or false.
Pair: A pair of objects. One former value and one latter value.
Lambda: Just a lambda function.
Set: The most common data type. Objects in a set is always sorted. Boolean < Number < Pair < Set < Lambda.

Document

See here for more info.

Implementation

Try it online!

Examples

Hello World

:72:101:108:108:111:44:32:119:111:114:108:100:33:10

A+B problem

.+,,

Truth Machine

#a,[a\.1!.0

Calculate Pi

:72:111:119:32:109:97:110:121:32:100:105:103:105:116
:115:32:100:111:32:121:111:117:32:119:97:110:116:63:32
#a 2#b 0#c 1#i 1~]1*,4 1 x\#t+*i 2 1#b*+a b t#c*c t#a*a i#i+i 1!`*b$c/i 4

Quine

#s|'0 33'1 58'2 51'3 53'4 58'5 49'6 49'7 53'8 58'9 49'10 50'11 52'12 126'13 115'14 32'15 105'16 92'17 58'18 51'19 57'20 46'21 60'22 105'23 58'24 51'25 50'26 46'27 62'28 105'29 33'30 126'31 115'32 32'33 105'34 92'35 58'36 62'37 105'38 33!:35:115:124~s i\:39.<i:32.>i!~s i\:>i!

Factorial

#p 1~]1+,1 1 i\#p*p i!.p