What means ':' in strcat ?

Can someone explain me what happens in the code below?

Thank you

for j=1:length(a)

for k=1:length(b)

c=strcat(a{j},':',b{k});

Answer 1

[Image Analyst]

It's taking whatever is in a{j} and adding a colon and then whatever is in b{k}. For example if a{j} is 'A1' and b{k} is 'H15' then c would be 'A1:H15'.

[Ioannis Vourvachakis]

aaah, thank you. I expected it more complicated :'(