SOURCE

// console.log(0b111110111 === 503)
// console.log(0o767 === 503 )
// console.log(Number('0b111') )

// console.log(Number.isFinite(123))
// console.log(Number.isFinite('123'))
// console.log(isFinite('123'))

// console.log(Number.isNaN(123))
// console.log(Number.isNaN('NaN'))
// console.log(Number.isNaN(NaN))
// console.log(isNaN(NaN)) //true
// console.log(isNaN('NaN')) //false
// console.log(isNaN('123')) //false
// console.log(isNaN(undefined)) //true
// console.log(isNaN('undefined'))//true


// console.log(Number(undefined))//NaN
// console.log(Number(null)) //0
// console.log(Number(NaN)) //NaN
// console.log(0.1 + 0.2)
console.log( Math.ceil(-1.2))
console.log(Math.trunc(-1.2))
console.log( Math.floor(2.2))
console.log(Math.trunc(2.2))