Such a great super great awesome example of nested for loops

spoon.js

function properCase(sentence){
  const words = sentence.split(' ');
  let newWords = []
  
  // Start the big spoon
  for(let i = 0; i < words.length; i++){
    const word = words[i];

    const letters = word.split('');
    let newLetters = [];

    // Start the little spoon, once per bigSpoon loop
    for(let n = 0; n < letters.length; n++){
      const letter = letters[n];
      if (n === 0){
        newLetters.push( letter.toUpperCase() )
      } else {
        newLetters.push( letter )
      }
    }

    newWords.push( newLetters.join('') )
  }

  return newWords.join(' ')

}


console.log( properCase("oh hai I am happy") )