Simple Question, Please Answer

hi i'm new and learning about genetic algorithm sample codes

this is part of the code

for ii=1:popsize
   for jj=1:nd
      g(ii,jj)=rand*(U-L)+L;
   end
end

can anyone explain me, how to read that code?

and what is

for x = 1:n

(i confused with the : )

Answer 1

[per isakson]

See colon, : Vector creation, array subscripting, and for-loop iteration and for for loop to repeat specified number of times

[Antoni Ho]

thank you man