Arrays 需要检查变量的条件并打印警报
我想检查variable countItems是否等于variable countMatchInput如果等于,则应发出警报Hi。变量countItems是一个数组 下面是Javascript代码Arrays 需要检查变量的条件并打印警报,arrays,variables,Arrays,Variables,我想检查variable countItems是否等于variable countMatchInput如果等于,则应发出警报Hi。变量countItems是一个数组 下面是Javascript代码 var countItems = ["C++", "C#", "VB", "Java and Ruby","Physics", "Chemistry", "Mathematics", "Social Science", "History", "Geography", "Rickshaw", "
var countItems = ["C++", "C#", "VB", "Java and Ruby","Physics", "Chemistry", "Mathematics", "Social Science", "History", "Geography", "Rickshaw", "Bike", "Car", "Bus and Train"];
function addCounts() {
var countMatchInput = document.getElementById("countMatchInput").value;
document.getElementById("demo").innerHTML = countMatchInput;
for (var i = 0; i < countItems; i++) {
if(countItems === countMatchInput)
{
alert("Hi");
}
}
};
var countItems=[“C++”、“C#”、“VB”、“Java和Ruby”、“物理”、“化学”、“数学”、“社会科学”、“历史”、“地理”、“人力车”、“自行车”、“汽车”、“公共汽车和火车”];
函数addCounts(){
var countMatchInput=document.getElementById(“countMatchInput”).value;
document.getElementById(“demo”).innerHTML=countMatchInput;
对于(变量i=0;i
下面是Html代码
<textarea id="countMatchInput"></textarea>
<button onclick="addCounts()">
Add
</button>
<p id="demo">
</p>
添加
您的for
循环出现故障:
var countItems = ["C++", "C#", "VB", "Java and Ruby","Physics", "Chemistry", "Mathematics", "Social Science", "History", "Geography", "Rickshaw", "Bike", "Car", "Bus and Train"];
function addCounts() {
var countMatchInput = document.getElementById("countMatchInput").value;
document.getElementById("demo").innerHTML = countMatchInput;
for (var i = 0; i < countItems.length; i++) {
if(countItems[i] === countMatchInput){
alert("Hi");
}
}
};
var countItems=[“C++”、“C#”、“VB”、“Java和Ruby”、“物理”、“化学”、“数学”、“社会科学”、“历史”、“地理”、“人力车”、“自行车”、“汽车”、“公共汽车和火车”];
函数addCounts(){
var countMatchInput=document.getElementById(“countMatchInput”).value;
document.getElementById(“demo”).innerHTML=countMatchInput;
对于(变量i=0;i