How to run 2 things in a single for loop?

Projects Programming
1

I wanted to draw alternating lines on LCD. I can do one line with

for (x2 = 0; x2 < 320,  x2 += 2); tft.drawLine(x1, y1, x2, y2, color1);

but how can I make it do another draw a second color at current x2 + 1? If I tried on the same line, the second part seems to be ignored. If I move it to next line, it ends up outside for loop.

2

nm ended up using while(x2 < 320); instead

3

If I tried on the same line, the second part seems to be ignored. If I move it to next line, it ends up outside for loop.

No surprise there.

Put { and } round code to be executed in a for loop even if there is only one command. C and C++ don't care that the code is on the same line as the for loop.

(for int x = 0; x < something; x++)
{
  //run this code
  //and run this code
}
4

That helps for next time!

5

Note that I put each { and } on their own line. This is not necessary, but as you can see it makes the code block stand out. Do the same for while loop and if/else tests and actions.