title: How can I validate a string to only allow string or string with numbers but not numbers only?
body: <p>I have textbox i want to give it expression for allowing string only or string with numbers but not to allow numbers only .. is this possible or not?</p>
  
  <p>thanks guys your answers are really helpful but theres another issue tho
  can i prevent user also from writing these symbols : or ` or " or ) or [ or { or ~ or . or / etc.. i mean any symbols like those ones!</p>
  
  <p>After @rinukkusu helped me with regex theres still one last thing though I dont want to allow the user to start the string with number and not in between also.. i want any number to be in the end of the string. I really appreciate your effort. Thanks!</p>
  
  <p>heres the regex i used</p>
  
  <pre><code>(?!^\d+$)^[A-Za-z0-9]+$
  </code></pre>