Letlang

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NumLang is a joke esolang created by PartehTheEsolangDev which uses numbers from 1-6 to make a simple output.

Syntax goes as follows:

"1" = Exit Program and Output
"2" = Add 1 to the character value
"3" = Subtract 1 from the character value
"4" = Loop the amount of times shown in the next character, cancels out the effect of 1s. 
"5" = Print "Hello, world!"
"6" = Squares the character value (value * value)

You can find the Python 3 interpreter he made if you click on "NumLang" at the beginning, or go to this page

-- EDIT -- Name changed to NumLang for conflits with programming language LetLang by LinkDD