Determine whether a variable or an object exist, i.e. were defined before in the code.

Usage

if(no(flare_angle)) flare_angle=4

In the piece of code above we have checked if the variable flare_angle has been defined previously in the code. If it has not been defined, we assign its value to 4. Otherwise, it will not be changed and will remain the same as defined previously.

---

https://www.sewist.com/pages/documentation#tp