Count Frequency of Each Character in a String

countFrequencyOfEachCharacter.js

function countLetters(str) {
  const smallString = str.toLowerCase();
  const obj = {};
  for (let i = 0; i < smallString.length; i++) {
  	if (obj[smallString[i]]) {
    	obj[smallString[i]] += 1;
    } else {
    	obj[smallString[i]] = 1;
    }
  }
  return obj;
}

console.log(countLetters("My Name is Mohammed Shoeb")); //{ : 4, a: 2, b: 1, d: 1, e: 3, h: 2, i: 1, m: 5, n: 1, o: 2, s: 2, y: 1 }