How do i increase the number value in " "

I have

a file to read multiple folder by looking at the number

%Image number set
number = "1" 
[first,second,third,fourth,five]= returnFiles(number);

%The function
function [first,second,third,fourth,five] = returnFiles(number)
.....

How do I keep looping and increase the number to read multiple file

Answer 1

[Walter Roberson]

for K = 1 : 50
    number = string(K);
   [first,second,third,fourth,five] = returnFiles(number);
end

[LinusL]

what does K = 1 : 50 do?

It count toward 50?

[Rik]

It creates a vector from 1 to 50. Combining it with the for keyword means it will execute the contents of the loop with each value of that vector stored in K.

Any Matlab tutorial will have taught you this. I would highly encourage you to do one.