let str = 'I am excited to join a new company'; function findOccurancesOfEveryChar(string) { let newStr = string.toLowerCase(); let obj = new Map(); for (let i = 0; i < newStr.length; i++) { let key = newStr[i]; if (obj.has(key)) { obj.set(key, obj.get(key) + 1); } else { obj.set(key, 1); } } return obj; } console.log(findOccurancesOfEveryChar(str));