how to only have a certain amount of numbers in an input of as many characters and number that the user wants

 prompt = 'Enter atleast 10 numbers: ';
   str=0;
   str = input(prompt,'s');
   while length(str)~=10 
   str = input(prompt,'s');
   end

that is the code that I'm using right now but I want the user to be able to input as many characters as they want but they can only enter 10 numbers. For example the user should be able to input:123we45ru687u90 but as long as it has ten numbers, the code will continue, no matter the amount of characters. Thank you!

[KSSV]

You remove the while condition. Simply use

prompt = 'Enter atleast 10 numbers: ';
str = input(prompt,'s');

Answer 1

[John Wirzburger]

If they must enter exactly 10 numbers and any number of characters, I would change your code to

prompt = 'Enter at least 10 numbers: ';
str='0';
while length(regexp(str,'\d'))~=10
str = input(prompt,'s');
end