本文介绍了数组中有多少个奇数和偶数的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我用一些数字创建了一个数组.我想找出多少个偶数和多少个奇数这个数组.我必须像这样打印出来:(这只是一个例子)
I have created an Array with some numbers. I want to find out how many even, and how many odd numbers it is in this Array. I have to print it out like this: (this is just an example)
偶数:6
奇数:7
我需要进行一个循环,以计算掉多少个偶数和奇数.
I need to make a loop that count up how many it is off even and odd numbers.
这是我到目前为止所拥有的
This is what I have so far
<script>
window.onload = run;
var tall = [5,10,15,20,25,30,35,40,45,50];
function run() {
tall = [5,10,15,20,25,30,35,40,45,50];
liste(tall);
}
function liste(arr) {
var sumOdd = 0; // Odd 1, 3, 5 etc..
var sumPar = 0; // Even 2, 4, 6 etc..
for(var i = 0; i < arr.length; i++) {
if(arr[i] % 2 === 0) {
sumPar += arr.length;
}
else {
sumOdd += arr.length;
} // Even numbers // Odd numbers
document.getElementById("print").innerHTML = "Partall: " + sumPar + "<br />" + "Oddetall: " + sumOdd;
}
}
}
</script>
这是错误的地方,我不知道是什么.
Its something that is wrong here, and I dont know what.
推荐答案
您正在添加 arr.length
,它是数组的长度.相反,您应该简单地增加数字
You were adding arr.length
which is the array length. Instead you should simply increment the number
var tall = [5, 10, 15, 20, 25, 30, 35, 40, 45, 50];
liste(tall);
function liste(arr) {
var sumOdd = 0;
var sumPar = 0;
for (var i = 0; i < arr.length; i++) {
if (arr[i] % 2 === 0) {
sumPar++;
} else {
sumOdd++;
}
}
console.log("Odd : " + sumOdd);
console.log("Par : " + sumPar);
}
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