This is a Javascript code. Could you please show me why my code is not working. It was working until I added the step.

// THE SUM OF A RANGE

var rangeNums = [];

var i, start, end, step;

var rangeTotal = 0;

function range(start, end, step){

for(i=start;i<=end;i=i+step)

rangeNums.push(i)

return rangeNums;

}

function rangeSum(rangeNums){

for(i=0;i

rangeTotal = rangeTotal + rangeNums[i];

}

return rangeTotal;

}

start = parseInt(prompt("what is the start number: "));

end = parseInt(prompt("what is the end number: "));

step = parseInt(prompt("what is the step between the values: "));

range(start,end,step);

console.log(rangeNums);

rangeSum(rangeNums);

console.log(rangeTotal);