It depends on the font. A mono-spaced font will tell the difference. For example, which is which below?
''
"
One trick is to click on the above, and use the cursor control keys on my keyboard, I can see the former is a 2 character pair, whereas the latter is just one character. I needed to click only once on the latter.
However, if we look at the two in a code block, MATLAB clearly distinguishes between the two.
And that tells it all. Now, without evaluating any of those code fragments, we see all the quotes were single quotes by putting them in a code block, even without evaluating them.
But had I simply set them in a mon-spaced font, the difference is also clear.
length([''''''''])
length([''''''' '])
length(['''''' ''])
length(['' '''' ''])
length([''' '' '''])
length(['' '' '' ''])
That works, even for my also admittedly old eyes. (Note the monospaced font here.)
