Answers for "Write a method that takes an array of consecutive (increasing) letters as input and that returns the missing letter in the array js."

Write a method that takes an array of consecutive (increasing) letters as input and that returns the missing letter in the array js.

function fearNotLetter(str) {  
  var string = array. join("");
  for (var i = 0; i < string. length; i++) {                    
    if (string. charCodeAt(i + 1) - string. charCodeAt(i) != 1) {
      return String. fromCharCode(string. charCodeAt(i) + 1);
    } 
  }
  return undefined 
}