Write a function that accepts a string. The function should capitalize the first letter of each word in the string then return the capitalized string.

capitalize.js

function capitalize(str) {
  
  const capitalizedSentence = [];

  for (let word of str.split(' ')) {
    const capitalizedWord = word[0].toUpperCase() + word.slice(1);
    capitalizedSentence.push(capitalizedWord);
  }

  return capitalizedSentence.join(' ');
}