Type casting, string to number to string

typescript에서 형변환 숫자에서 문자열에서 숫자 등 Type casting string to number to string, 

 

var v1:number = 1;
var s1:string = (v1 as unknown) as string;
var s1b:string = String(v1);
var s2:string = String('123');
var v2:number = Number(s2);