学习JavaScript第一天--console 里练习JavaScript基本型别

typeof-->可以查出型别

 let a = 1 ;
 undefined
 a
 1
 typeof a  
 "number"

a的型别是"number"

let milkPrice = 30;
let milkNum = 5 ;
let totle = milkPrice * milkNum ;

totle
150

总共是150

ex:anita身上有200元，经过清心饮料店，想买饮料给家人喝，一杯无糖少冰乌龙绿茶30元，一杯无糖少冰养乐多绿茶45元，两杯无糖少冰青茶30元，请问anita还剩多少钱？
1.anita身上有200元
2.乌龙绿茶30元
3.养乐多绿茶45元
4.青茶30元
5.乌龙绿茶一杯
6.养乐多绿茶一杯
7.青茶两杯

let anitaMoney = 200 ;
let OolongteaPrice = 30 ;
let YakultgreenteaPrice = 45 ;
let Greenteaprice = 30 ;
let OolongteaNum = 1 ;
let YakultgreenteaNum = 1 ;
let GreenteaNum = 2 ;
let leftMoney = anitaMoney-(OolongteaPrice * OolongteaNum)-(YakultgreenteaPrice * YakultgreenteaNum)-(Greenteaprice * GreenteaNum) ;

ans:leftMoney = 65