Javascript中for循环的每个参数都有多个操作

Question

Is there a syntax to include multiple initialization or final expression on a for loop in javascript?

For instance initialize two variables, or increment two variables.

I don't see anything about it on the MDN documentation .

Answer 1

I think this is what you're asking for....

for (var i = 0, a = 1; i < 10; i++, a += 2) {
    console.log(i, a);
}

output:

0 1
1 3
2 5
3 7
4 9
5 11
6 13
7 15
8 17
9 19