다) 반드시 변수나 프로퍼티, 배열 요소 중 하나여야 합니다(상수에 값을 할당하는 것은 엄밀
히 말해 선언의 일부이며 할당 연산자가 아닙니다). 즉, 표현식의 좌변에 있는 것은 반드시 값
을 저장할 수 있는 것이어야 합니다.
이 장 초반에서 할당 자체도 표현식이며 값을 반환하므로 다시 할당할 수 있다고 설명했습니
다. 이런 성질을 이용해 할당을 체인으로 연결할 수 있습니다.
let
v
,
v0
;
v
=
v0
=
9
.
8
; // 먼저
v0
가
9
.
8
이 되고, 그다음
v
가
9
.
8
이 됩니다.
//
while
문의 조건에 있는 할당을 보십시오. 먼저
n
이
nums
[
i
]의 값을 받고,
// 다음에는 표현식 전체가 그 값으로 평가되므로 숫자로 비교할 수 있습니다.
const
nums
= [
3
,
5
,
15
,
7
,
5
];
let
n
,
i
=
0
;
while
((
n
=
nums
[
i
]) <
10
&&
i
++ <
nums
.
length
) {
console
.
log
(`
Number
less
than
10
: ${
n
}.`);
}
console
.
log
(`
Number
greater
than
10
found
: ${
n
}.`);
console
.
log
(`${
nums
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