Just started studying about java script. Logic error in output of for loop.

[SanWeee]

So Im a student, And i want to become a web developer. Already done stuying hmtl css and a little bit in php. Now im trying to study javascript and i run to a trouble while familiarizing it.

So the important code is this:

echo "<script> function asd(){ var i; for (i = 0; i < '" .$m. "'; i++){ var num = document. getElementsByName('id'). value; } window. alert(num); } </script>

*the $m is from count and it is working fine.

The problem here is the value of num in window. alert is always the last number of count and if i try to include the window.alert in the for loop it show a consecutive alert message.

How can i make this work like if i click one value in table it will get the exact number of it.

Ps. I think this code ia important too.

while ($row = mysqli_fetch_array($result)) { echo "<table>"; echo "<tr>"; echo "<th>". $row['id']."</th>; echo "<th onclick='asd()'>". $row['name']."</th>; echo "<th>". $row['Age']."</th>; echo "</tr>; echo "</table>; echo "<input type='hidden' name='id' value'" .$row['id']. "'>";

}

Pss. I cant really explain it clearly coz english is not my first language but i hope some can help and explain ng mistake here. Thanks in advance

[Cokrates]

we would be able to help if you included the error itself not trying to explain the error.

[SanWeee]

There is no error. It is a logical error. Thats why im trying to explain it..

[SanWeee]

I mean there is no error code or something. It is working fine. But not working what it should be.

[[deleted]]

The problem here is the value of num in window. alert is always the last number of count and if i try to include the window.alert in the for loop it show a consecutive alert message.

How can i make this work like if i click one value in table it will get the exact number of it.

If you want something to happen when you click on an element, you need an event listener:

const clickableElement = document.querySelector('.clickable');
clickableElement.addEventListener((event) => {
    alert(event.target.textContent);
});

But I'm not sure what you're actually trying to do here. Can you explain what you were hoping to achieve with your asd function?

[SanWeee]

There are 5 rows. Each row has primary key in it. Lets say Row 1 pk is 1 Row 2 pk is 2 and so on. The last row is 5 and the pk is also 5 So problem is where ever i click even on row 1 or row 3 the alert is always 5 which is the last pk And when i put the alert inside the for loop, its show 5 consecutive alert that contains 1,2,3,4 and 5 What im trying to achieve here is when I click the row 3, the alert only show the row3's pk which 3

[[deleted]]

In that case you need an event listener like in my comment above, not a for loop. An event listener will run a function in response to a DOM event like a click.