일반함수

rule

function funcName( input : input type ) return type {
...expression
}

code ex

function addNumToString(num1: number, num2: number) string {
  return String( num1 + num2 )
}

화살표함수

rule

var funcName = (input : input Type ) : return Type => expression... ;

code ex

let corsURL = (url:string): string => `https://crossorigin.me/${url}`;

corsURL('http://yamoo9.herokuapp.com/rest/ediya-menu');