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I need help with a javascript assignment: Write a program called sum_number.js, that calculates the sum...

I need help with a javascript assignment:

Write a program called sum_number.js, that calculates the sum of the numbers contained in a string and displays the result. Use a string containing “2155” as your input value. For example, given the input , let num = “22”, I would sum 2 + 2 for a result of 4. The power is the amps at a given hour times the voltage at the same hour. Calculate the average power consumed for the day and display it at the end. i.e

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Answer #1

<!DOCTYPE html>
<html>
<body>

Enter Number: <input type="text" id="num" name="txt"
onchange="myFunction(this.value)">

<script>
function myFunction(val) {
sum=0,n=0;
num=parseInt(val);
while(num > 0)
{
n = num % 10;
sum = sum + n;
num = num / 10;
}
alert(Math.floor(sum));
}
</script>

</body>
</html>

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