how to use .length - 1 for strings javascript code example

Example 1: javascript string lentrh

var myString = "string test";
var stringLength = myString.length;

console.log(stringLength); // Will return 11 because myString 
// 							  is 11 characters long...

Example 2: How to get length of string in javascript without using native length method

var str = userInput[0];
  var count = 0;
  while(str[count] !== undefined)
  {
      count += 1;
  }
  console.log(count)