Number()
ParseFloat()
ParseInt()
String()
toString()
toExponential()
toFixed()
toPrecision()
// String To Number
Number("3.14")
Number(Math.PI)
Number(" ")
Number("")
let y = "5"; // y is a string
let x = + y; // x is a number
// Number To String
String(x)
String(123)
String(100 + 23)
x.toString()
(123).toString()
(100 + 23).toString()