普通

let number = 2

if((number%2) == 0) {
  console.log("偶数(even)")
} else {
  console.log("奇数(odd)")
}

0以上

let number = 0

if(number == 0) {
  console.log("zero")
} else if ((number%2) == 0) {
  console.log("偶数(even)")
} else {
  console.log("奇数(odd)")
}