let + switch

switchy.js

// What is the console output of this code?

function switchFoo (foo) {
  switch (foo) {
    case 1: 
      foo = 5
      console.log(foo)
    case 2: {
      console.log(foo)
      break
    }  
    case 3: {
      let foo = 6
      console.log(foo)
    }  
    case 4: {
      console.log(foo)
      break
    }  
  }  
}

switchFoo(1)
switchFoo(2)
switchFoo(3)
switchFoo(4)