G-Code Tutorial: Conditions and Looping

CNC G-Code Tutorial on Macro or Parameterized Programming of IF, GOTO, and WHEN Control Structures.

G Code Reference

qph.cf2.quoracdn.net/main-thumb-1370286554-200-lfv

Python enumerate(): Simplify Loops That Need Counters – Real Python

CNC PROGRAMMING - LOOPS AND UNCONDITIONAL JUMP

G-Code Tutorial: Conditions and Looping

OrcaSlicer- An Introduction and How to Get Started

Python Loops Tutorial: For & While Loop Examples

Go for Loop (With Examples)

Code.org Tool Documentation

Can googological functions be computable in programming languages? - Quora