what does the red dot on the line number in matlab mean?

what does the red dot on the line number in matlab mean? A picture is included.

Answer 1

[Steven Lord]

That is a breakpoint. One of the main uses for breakpoints is to help debugging your code, to stop on a particular line to allow you to examine the state of your program. A red dot is a standard breakpoint. There are also conditional breakpoints (yellow dots) that stop only if a certain condition is satisfied.

Answer 2

[ddd ppp]

OMG IT MEANS TO STOP ON THE LINE. that is so useful

[Stephen23]

Indeed, it is very useful.

https://www.mathworks.com/help/matlab/matlab_prog/set-breakpoints.html

https://www.mathworks.com/help/matlab/matlab_prog/debugging-process-and-features.html