Javascript 通过用户提示查找数字的因子
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Finding Factorial of a number through prompt from the user
提问by Amjad
I have been struggling with the this output from which hangs my browser. When I run the following code it runs fine.
我一直在努力解决挂起我的浏览器的这个输出。当我运行以下代码时，它运行良好。
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Untitled Document</title>
</head>
<body>
<script type="text/javascript">
var input = 5;
for(var i=1;i< 5;i++){
input = i*input;
}
document.write(input);
</script>
</body>
</html>
But this hangs the browser and I have to stop it finally. I cant't find any bug or error in this code.
但这会挂起浏览器，我最终必须停止它。我在这段代码中找不到任何错误或错误。
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Untitled Document</title>
</head>
<body>
<script type="text/javascript">
var input = prompt("Enter the number to get factorial of: ");
var result = input;
for(var i=1;i < input;i++){
result = i * result;
}
document.write(result);
</script>
</body>
</html>
回答by Pavel Birukov
input = i*input;increases inputso i < inputis always false. Try smth like
input = i*input;增加总是input如此。试试看i < inputfalse
var input = parseInt(prompt("Enter the number to get factorial of: "));
var result = input;
for(var i=1;i < input;i++){
result = i * result;
}
document.write(result);
回答by vish
<html>
<head>
<title> New Document </title>
<script type="text/javascript">
function fact(num)
{
var x=parseInt(num);
if(x>0)
x=x* fact(x-1);
alert(x);
}</script>
</head>
<body>
<form name="f1">
Enter the Number :<input type="text" length="8" name="txt1"><br>
<input type="button" value="Find factiorial" onclick="fact(txt1.value)">
</form>
</body>
回答by user3557990
var y = prompt("type number ");
var x = input;
function fact(x) {
if(x==0) {
return 1;
}
return x * fact(x-1);
}
function run(number) {
alert(fact(parseInt(number, 10)));
}
run(x);
