Switch Statement

switch (expression) {
  case value1:
    // Code for value1
    break
  case value2:
    // Code for value2
    break
  default:
    // Code if no match
}
 const grade = 'A'
 switch (grade) {
  case 'A':
    console.log('Excellent!')
    break
  case 'B':
    console.log('Good job!')
    break
  case 'C':
    console.log('Passing')
    break
  default:
    console.log('Keep trying')
}

const day = 'Monday'
 // WITHOUT break (wrong!)
switch (day) {
  case 'Monday':
    console.log('Start of week')
    // Falls through!
  case 'Tuesday':
    console.log('Second day')
    // All of these run!
}
 // WITH break (correct!)
switch (day) {
  case 'Monday':
    console.log('Start of week')
    break  // Exits the switch
  case 'Tuesday':
    console.log('Second day')
    break
}

const month = 'December'
 switch (month) {
  case 'December':
  case 'January':
  case 'February':
    console.log('Winter')
    break
  case 'March':
  case 'April':
  case 'May':
    console.log('Spring')
    break
  case 'June':
  case 'July':
  case 'August':
    console.log('Summer')
    break
  case 'September':
  case 'October':
  case 'November':
    console.log('Fall')
    break
  default:
    console.log('Invalid month')
}

const color = 'red'
 if (color === 'red') {
  console.log('Stop')
} else if (color === 'yellow') {
  console.log('Slow down')
} else if (color === 'green') {
  console.log('Go')
} else {
  console.log('Invalid color')
}

const color = 'red'
 switch (color) {
  case 'red':
    console.log('Stop')
    break
  case 'yellow':
    console.log('Slow down')
    break
  case 'green':
    console.log('Go')
    break
  default:
    console.log('Invalid color')
}