When the value equals 25

I am seeking to implement a text field where users can input a number, and based on whether it's correct or not, display "image a" for the correct answer and "image b" for an incorrect one below the text field. I want users to have multiple attempts until they get the right number. The only solution I've come across is this:

Apologies for the lack of expertise, folks!


var userNumber = prompt("Please enter a number", "");
document.write(userNumber);

if (isNaN(userNumber)) {
   document.write("This is not a number");
} else {
   document.write("This is a number");
}

Answer №1

When the user inputs characters, you will need to compare strings by utilizing the === operator to check for equality with the string "25".

To showcase the image on the webpage, each image in HTML must be assigned a unique ID. Following this, you can access the specific element using

document.getElementById("some_id")
in JavaScript. Displaying or hiding the image is achieved by setting element.style.display = "block" or "none".

Answer №2

Check out this code snippet:

<script type="text/javascript">
function verify_input()
{
   var number = document.getElementById('input_number').value;
   var image = number == '25' ? 'success.png' : 'failure.png';
   document.getElementById('result_image').src = image;
   document.getElementById('result').style.display = 'block';
}
</script>

<input type="text" id="input_number"
<input type="submit" onclick="verify_input();return false;">

<div id="result" style="display:none;">
   <img src="blank.png" alt="" id="result_image">
</div>

Answer №3

Begin your coding journey with this simple snippet

let user_input = prompt("Enter any number","");
document.write(user_input);

if(user_input === '25'){
    document.write('Correct');
} else {
    document.write('Incorrect');
}

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