Can someone advise me on how to ensure my function effectively delivers a desired outcome?

Question

Can someone advise me on how to ensure my function effectively delivers a desired outcome?

My goal is to learn Javascript on my own, but I'm struggling to make progress. I've created a function called fixedSpending() that takes two inputs, num1 and num2, and adds them together. However, when the user hits the "=" button, I expect the function to return the total. Unfortunately, this isn't happening as I keep encountering an uncaught reference error in the console stating that fixedSpending() is not defined. I'm confused as to why this error is occurring.

I would greatly appreciate any assistance or resources for learning more about this topic.

 <html>
    
    <head>
      <title>
        Budget Form
        <script type="text/javascript">
        function fixedSpending(){
          var num1=parseFloat(document.getElementById("num1").value)
          var num2=parseFloat(document.getElementById("num2").value)
    
          return document.getElementById('result').value= num1 + num2;
        } 
        </script>
      </title>
    
    </head>
    <body>
      <h2></h2>
      <br>
      num1:&nbsp;<input type="text" id="num1" maxlength="10"><br>
      num2:&nbsp;<input type="text" id="num2" maxlength="10"><br>
      <input type="Button" value= "=" onclick="fixedSpending();"><br>
      Result: <input type="text" id="result">
    </body>
</html>

The error message reads: Uncaught ReferenceError: fixedSpending is not defined

javascript

Answer 1

Answer №1

It appears that there is an issue with your HTML code. The <script> tag should not be placed inside the <title> tag. To resolve this, you just need to move the <script> tag outside of the <title> tag. Here is the corrected code:

<html>
    <head>
        <title>Budget Form</title>
        <script type="text/javascript">
            function fixedSpending(){
                var num1 = parseFloat(document.getElementById("num1").value);
                var num2 = parseFloat(document.getElementById("num2").value);

                return document.getElementById('result').value = num1 + num2;
            }
        </script>
    </head>
    <body>
        <h2></h2>
        <br>
        num1: &nbsp;<input type="text" id="num1" maxlength="10"><br>
        num2: &nbsp;<input type="text" id="num2" maxlength="10"><br>
        <input type="Button" value="=" onclick="fixedSpending();"><br>
        Result: <input type="text" id="result">
    </body>
</html>

Answer 2

It appears that there is an issue with your HTML code. The <script> tag should not be placed inside the <title> tag. To resolve this, you just need to move the <script> tag outside of the <title> tag. Here is the corrected code:

<html>
    <head>
        <title>Budget Form</title>
        <script type="text/javascript">
            function fixedSpending(){
                var num1 = parseFloat(document.getElementById("num1").value);
                var num2 = parseFloat(document.getElementById("num2").value);

                return document.getElementById('result').value = num1 + num2;
            }
        </script>
    </head>
    <body>
        <h2></h2>
        <br>
        num1: &nbsp;<input type="text" id="num1" maxlength="10"><br>
        num2: &nbsp;<input type="text" id="num2" maxlength="10"><br>
        <input type="Button" value="=" onclick="fixedSpending();"><br>
        Result: <input type="text" id="result">
    </body>
</html>

Answer 3

Answer №2

To start, take the script out of the title tag as it is currently nested inside.

Next, relocate the script to right above the closing body tag. This ensures that the form fields are fully rendered before any manipulation or data usage takes place, following common practice.

Lastly, eliminate the term "return" from your function. The function does not require a specific return value since it only needs to set the result field's value. Simply remove "return" from the final line of your function.

Answer 4

To start, take the script out of the title tag as it is currently nested inside.

Next, relocate the script to right above the closing body tag. This ensures that the form fields are fully rendered before any manipulation or data usage takes place, following common practice.

Lastly, eliminate the term "return" from your function. The function does not require a specific return value since it only needs to set the result field's value. Simply remove "return" from the final line of your function.

Answer 5

Answer №3

According to @Bjarke's observation, it seems that your script is not properly embedded within the HTML document. To rectify this issue, make sure to place the script just above the closing </body> tag. Additionally, there is no need to use the return statement as you are simply assigning a value to an input field. You can try the following corrected code:

<html>
  <head>
    <title>
      Budget Form
    </title>
  </head>
  <body>
    <h2></h2>
    <br>
    num1:&nbsp;<input type="text" id="num1" maxlength="10"><br>
    num2:&nbsp;<input type="text" id="num2" maxlength="10"><br>
    <input type="button" value= "=" onclick="fixedSpending();"><br>
    Result: <input type="text" id="result">
    <script>
        function fixedSpending() {
            var num1 = parseFloat(document.getElementById("num1").value)
            var num2 = parseFloat(document.getElementById("num2").value)
            document.getElementById('result').value = num1 + num2;
        };
    </script>
  </body>
</html>

Feel free to test this adjusted code on jsfiddle: https://jsfiddle.net/mzvnfow2/2/

Answer 6

According to @Bjarke's observation, it seems that your script is not properly embedded within the HTML document. To rectify this issue, make sure to place the script just above the closing </body> tag. Additionally, there is no need to use the return statement as you are simply assigning a value to an input field. You can try the following corrected code:

<html>
  <head>
    <title>
      Budget Form
    </title>
  </head>
  <body>
    <h2></h2>
    <br>
    num1:&nbsp;<input type="text" id="num1" maxlength="10"><br>
    num2:&nbsp;<input type="text" id="num2" maxlength="10"><br>
    <input type="button" value= "=" onclick="fixedSpending();"><br>
    Result: <input type="text" id="result">
    <script>
        function fixedSpending() {
            var num1 = parseFloat(document.getElementById("num1").value)
            var num2 = parseFloat(document.getElementById("num2").value)
            document.getElementById('result').value = num1 + num2;
        };
    </script>
  </body>
</html>

Feel free to test this adjusted code on jsfiddle: https://jsfiddle.net/mzvnfow2/2/

Can someone advise me on how to ensure my function effectively delivers a desired outcome?

Answer №1

Answer №2

Answer №3

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