infinite loop using for loop code example

Example 1: javascript infinite for loop

var userInput;
		   var more;
		   
           userInput=prompt("Select number from 0 to 9","")
		   userInput=parseInt(userInput);
		  

		  for (index=userInput;index < 0;index>9 ) {
	document.write("Not in range");
	
	
}
document.write("Not in range");

Example 2: infinite loop using while

infinite loop using 'while'loop ---->  while(1)