text: // numbers
  
  123
  123.45
  
  // strings
  
  console.log('Hello \'world\'!')
  console.log("Hello 'world'!")
  
  console.log("Hello \"world\"!")
  console.log('Hello "world"!')
  
  // template literal - template string
  const who = 'world'
  
  console.log('Hello ' + who + '!')
  
  console.log(`Hello ${who}!`)
  
  // booleans
  true
  false
  
  // NOT
  !true = false
  !false = true
  
  !!true = true
  !!false = false
  
  // AND
  true && true = true
  true && false = false
  false && true = false
  false && false = false
  
  // OR
  true || true = true
  true || false = true
  false || true = true
  false || false = false
  
  4 > 1 -> true
  4 < 1 -> false
  4 >= 1 -> true
  1 >= 1 -> true
  4 <= 1 -> false
  1 <= 1 -> true
  4 == 1 -> false
  1 == 1 -> true
  
  4 === 1 -> true
  
  // null
  
  null
  
  
  // undefined
  
  undefined
  
  let iLikeIcecream = undefined