Answers for "how to access a key that starts with @ in js"

js startswith

var str = "Hello world, welcome to the universe.";
var n = str.startsWith("Hello");

how to check string start with #

public class JavaExample{  
   public static void main(String args[]){ 
	//given string
	String s = "   This is just a sample string";  
		
	//checking whether the given string starts with "This"
	System.out.println(s.startsWith("This"));  
		
	//checking whether the given string starts with "Hi"
	System.out.println(s.startsWith("Hi"));  
   }
}