JavaScript Nested While Loop, Loops infinitely

Question

So I'm trying to create a loop that will reduce any number put into it to a single digit. The way I'm doing my math is adding each number up one by one. In this case 9+9+9+9+9+9+9+9+9+9+9+9=108. I want it to run through and check that 108 is still greater than 9 and do it till the result is less than 9. It just gets stuck in a loop. I've also tried some variants that will return NaN.

<html>
<body>

<h1>Reduce Loop</h1>

<p id="Result"></p>

<script type="text/javascript">
//Defined var start
var Result = 0;
var TempReduce1 = 0;
var LoopTempLength = 0;
var LoopTempString;
var i = 0;
//Defined var end
//The LongNumber variable represents user input
var LongNumber = 999999999999;
//Converts LongNumber to a integer
var LoopTemp = parseInt(LongNumber);
//Check if LoopTemp is greater than 9; it is
while (LoopTemp > 9) {
    //Gets the Length of LoopTemp by converting it to a string and grabbing the length to then convert back to a integer
    LoopTempLength = parseInt(LoopTemp.toString().length);
    //Converts LoopTemp to a string for manipulation
    LoopTempString = LoopTemp.toString();
    i = 0;
    //Check to see if i is less than the length of LoopTempLength
    while (i < LoopTempLength) {
        //Grabs the number in relationship to i, converts it to a integer and added it to TempReduce1
        TempReduce1 += parseInt(LoopTempString.charAt(i));
        i++;
    }
    LoopTemp = TempReduce1;
}   
Result = LoopTemp;

        document.getElementById("Result").innerHTML = Result;

</script>

</body>
</html>

Answer 1

So Patrick Evans has it right. I inserted

TempReduce1=0;

in your code after the line

i=0

and the routine kicked out 9 as one would expect.

JavaScript Nested While Loop, Loops infinitely

Question

1 answers

solution1
0 ACCPTED 2016-12-01 04:59:20

JavaScript Nested While Loop, Loops infinitely

Question

1 answers

solution1 0 ACCPTED 2016-12-01 04:59:20

solution1
0 ACCPTED 2016-12-01 04:59:20