//변수 ,자료형, 함수, 조건문 ,반복문 undefined

/자료형/

undefined let a_list =[‘수박’,참외’,’배’] VM961:1 Uncaught SyntaxError: Unexpected string let a_list =[‘수박’,’참외’,’배’] undefined a_list (3) [“수박”, “참외”, “배”] a_list(1) VM1021:1 Uncaught TypeError: a_list is not a function at :1:1 a_list[0] "수박" a_list.push('감') 4 a_list.pop('감') "감" a_list.pop('수박') "배" a_list (2) ["수박", "참외"] // pop 은 LIFO 룰에 따름 undefined

/사전형/ ​let a_dic = {‘name’:’bob’,’age’:27} undefined let a_dict = {‘name’:’bob’,’age’:27} undefined let a_dict[‘name’] VM1836:1 Uncaught SyntaxError: Unexpected token ‘[’ a_dict[‘name’] “bob” a_dict[‘age’] 27 a_dict[‘height’]= 180 180 a_dict {name: “bob”, age: 27, height: 180} a_dict[‘fruits’]=a_list (2) [“수박”, “참외”] a_dict {name: “bob”, age: 27, height: 180, fruits: Array(2)}age: 27fruits: (2) [“수박”, “참외”]height: 180name: “bob”proto: Object //이중리스트 a != 100 false let myemail= ‘dpdtydz@donga.ac.kr’ undefined myemail.split(‘@’) (2) [“dpdtydz”, “donga.ac.kr”] myemail.split(‘@’)[1] “donga.ac.kr” myemail.split(‘@’)[1].split(‘.’) (3) [“donga”, “ac”, “kr”] myemail.split(‘@’)[1].split(‘.’)[10] undefined myemail.split(‘@’)[1].split(‘.’)[0] “donga”

/* 함수*/

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