title: How to check a character is alphabet or integer
body: <p>In my project i have string suppose NSString* str = @"$ 120.00";</p>
  
  <p>From the above string i am getting every individual character, Now i have to get all integres in the string i.e, $ is not a integer so i dont want that, "1" is a integer i want that like this . How can i do that can any one help me</p>
  
  <p>Thank you</p>