ah perhaps it's wiki french page?

I undertsand but I've choosen 2d array of char because it's easier to plot pixels

But to show result I think it's more clear as unique string with \n because it looks like a screen of big pixels.

The sample code as already the good return written

I've done some text modification

Thanks for feed back

Because the algorithm doesn't need it

eval was not desactivated because it's not really interessing here. It's not like in some kata where the goal is to eval arithmetic expression.

Tests updated. Code checks tests fails now

Thanks I think the issue is fixed now

Still in beta after 6 years ok

You're not really doing Bresenham in your solution because you use * / float

Perhaps i should add some advice and some check for that (using only + - integer bit shifting)

Yes but mine is different because you plot the pixels on the virtual screen and see the result.

The duplicate is very old and still in beta...

You're right but with Bresenham Line Algorithm you should have the second one if you draw from 0,1 to 2,0 and the first one if you draw from 2,0 to 0,1.

I've changed title of kata to indicate that Bresenham algorithm should be used and order matter because not so easy with random test to have multiple solutions...

Thanks for feed back

The task is to draw the line on screen using color. Perhaps I should precise bresenham...