If / Else

if (7 % 2 === 0) {
  console.log('7 is even')
} else {
  console.log('7 is odd')
}

// You can have if without else
if (8 % 4 === 0) {
  console.log('8 is divisible by 4')
}

// Many branches
const duck = 'blue';
if (duck === 'yellow') {
  console.log('Rubber ducky')
} else if (duck === 'brown') {
  console.log('Live duck')
} else {
  console.log('Ive never seen a blue duck before.')
}

$ node jsbyexample.js
7 is odd
8 is divisible by 4
Ive never seen a blue duck before.