JavaScript面试题集（六）

var f = true;
if (f === true) {
var a = 10;
}

function fn() {
var b = 20;
c = 30;
}

fn();
console.log(a);
console.log(b);
console.log©;
2.
var x = 1;
var y = 0;
var z = 0;
function add(n){n=n+1;}
y = add(x);
function add(n){n=n+3;}
z = add(x);
3.
for(i=0, j=0; i<10, j<6; i++, j++){
k = i + j;
}
4.
var two = 0.2;
var one = 0.1;
var eight = 0.8;
var six = 0.6;
[two -one == one,eight- six == two];
运行结果，求更严谨的写法。
5.
编写一个方法 去掉一个数组的重复元素
eg：var arr = [1,2,3,1,43,12,12,1];
6.
JavaScript中如何检测一个变量是一个String类型？
7.
实现
“hello world” -> ‘h e l l o w o r l d’

标签：function,console,log,JavaScript,two,试题集,add,var
来源： https://blog.csdn.net/GBS20200720/article/details/122778814