javascript 
chromeȸ

̨  F12
سִд
shift+سеִд
·ǰִйĴ


ڱ

Ӣĸʼ

var a
var a=100ֵĬϸֵundefined
var a,b,c;
var a=10,b=100,c=1000;
d=50;


ݣNumberַString


alert("ҪĶ");
˵ԣ

console.log("ڿ̨")


һ

Ʒ۸ price
Ʒ count
ܼ total
ͻ pay
 change

prompt"롭"
û붫ã
var a=prompt("֣");

















