returnhundred = () => `${+!![]}${+![]}`**(+!![] + +!![])
//returnhundred = () => ((![]).toString().length * ([] ** [] + [] ** [])) ** ([] ** [] + [] ** [])

returnhundred=()=>+`${10**2}`

const helloWorld = n => {
return [n,...[...'Hello ']
                  .map(el => el.charCodeAt())
                    .reverse()
                      .map(num => String.fromCharCode(num))
  ]
      .reverse()
        .join``
}

isEven = x => [!0,!1][x%2]

// Previous iteration
//isEven = x => [true,false][x%2]

// Previous iteration
//const isEven = x => !(Number.isInteger(+x))? undefined : !(x%2)

// Previous iteration
// isEven = x => !x || !Number.isInteger(x) ? undefined : x % 2 ? false : true;

// Previous iteration
// isEven = x => x!=~~x?undefined:!(x%2);

// Previous iteration
// isEven = num => num % 2 === 0 ? true : num % 1 === 0 ? false : undefined;

// Previous iteration

// function isEven(num) {
// return num % 2 === 0 ? true : num % 1 === 0 ? false : undefined;

helloWorld = n => (n.split(" ")+' Hello')
.split(" ")
.reverse()
.join(" ")

const isEven = x => !(Number.isInteger(+x))? undefined : !(x%2)

// Previous iteration
// isEven = x => !x || !Number.isInteger(x) ? undefined : x % 2 ? false : true;

// Previous iteration
// isEven = x => x!=~~x?undefined:!(x%2);

// Previous iteration
// isEven = num => num % 2 === 0 ? true : num % 1 === 0 ? false : undefined;

// Previous iteration

// function isEven(num) {
// return num % 2 === 0 ? true : num % 1 === 0 ? false : undefined;