String rewriting paradigm

Not to be confused with String-rewriting paradigm, nor Category:String-rewriting paradigm.

String rewriting paradigm is a programming language invented by User:A.

Syntax

d: duplicate the next character.
Example: d* results in **.

!: pushes the last character in the current line

@: pops the top of the stack to the end of the line.

:: Outputs every character before the colon.

Examples

Infinite loop

dd

Looping counter

!@: