if...else - JavaScript | MDN

/* 
function functionName(condition) {
	if(condition) {
   	  statement1
	} else {
   	  statement2
	}
}
*/

function isRose(cat) {
  if(cat === 'rose') {
    return 'Hi, Rose. You are cute!'
  } else {
    return `Hi, ${cat}!`
  } 
}

function isRose(cat) {
  if(cat === 'rose') {
    return 'Hi, Rose. You are cute!'
  } else if(typeof cat === 'string') {
    return `Hi, ${cat}!`
  } else {
    return 'Sorry. Please pass in a cat name.'
  }
}