Javascript JS 형변환

String()

console.log(
String(3),
String(true),
String(null),
String(undefined)
)

결과

 

Number()

console.log(Number("1234"), Number(true), Number(false), Number("1234asdf456"));

결과

 

Boolean()

true

console.log(Boolean(1), Boolean(123), Boolean("Javascript"));

 

false

console.log(Boolean(0), Boolean(""), Boolean(null), Boolean(undefined), Boolean(NaN));

결과