Question

有一个数组【1，2，3，4，5，6，7，8，9】，利用JS求出奇数和偶数的个数

RT

Answer 1

<script type="text/javascript">
(function() {
    //m偶数, n奇数
    var m = 0, n = 0;
    var t = [1,2,3,4,5,6,7,8,9,4,4,4];
    for (var j in t) {
        t[j] % 2 === 0 ? m++ : n++;
    }
    alert(m);
})();
</script>

Answer 2

<script language="javascript">var arr=new Array(1,2,3,4,5,6,7,8,9);var odd=0;var even=0;for(var i=0;i<arr.length;i++){ if(arr[i]%2==0) { even++; } else { odd++; }}alert("偶数个数为："+even);alert("奇数个数为："+odd);</script>

Answer 3

<script
language="javascript">var
arr=new
Array(1,2,3,4,5,6,7,8,9);var
odd=0;var
even=0;for(var
i=0;i<arr.length;i++){
if(arr[i]%2==0)
{
even++;
}
else
{
odd++;
}}alert("偶数个数为："+even);alert("奇数个数为："+odd);</script>