Legend problem in 2018b version

Hi All:

I am defining a cell array of strings that is to be read by the legend command later in a loop.

Case_Name={'R1','R2','R3'};

legend(Case_Name{kk}, font);

The code was wroking on older version but now gives me an error

Error using legend (line 261)

Invalid argument. Type 'help legend' for more information.

Any help would be appreciated

Thank you

[Walter Roberson]

What does the font variable contain?

[Abdulaziz Abutunis]

sorry I should mention that. I defined it earlier in the code as font = 12;

Thank you for the effort

[Walter Roberson]

You now need 'FontSize', 12 instead of just 12

[Abdulaziz Abutunis]

Walter Roberson you are right. though it was working in older version donno how.

BIG thank you

[Devineni Aslesha]

Hi Abdulaziz Abutunis

I would like to know the purpose of using the legend command in a loop. Is it like creating three plots in different figure windows so that cell array of strings is read by the legend command later in a loop? Or Is it like creating three plots in the same figure window?