findSumOddNumbersRange()

Step 1: Problem Understanding and Analysis

The task requires us to write a function that calculates the sum of all odd numbers in a given range. We can achieve this by iterating through each number in the range and checking if it's odd. If it is, we add it to our sum.

For example, if our range was from 1 to 5, the odd numbers are 1, 3, and 5. Thus, the sum of these odd numbers is 9.

Let's now prepare the initial structure of our function:

function findSumOddNumbersRange(start, end) {

}

Step 2: Iterating Over the Range of Numbers

We know that we should iterate starting from the 'start' parameter up to the 'end' parameter. We will use a for loop for this.

Here's how our function looks with the for loop:

function findSumOddNumbersRange(start, end) {
    for(let i = start; i <= end; i++){

    }
}

Step 3: Checking for Odd Numbers

Here we should include the odd check inside the for loop. We can identify if a number is odd by checking if the remainder when it's divided by 2 is not zero.

Here's how our function looks with the odd check:

function findSumOddNumbersRange(start, end) {
    for(let i = start; i <= end; i++){
        if(i % 2 !== 0){

        }
    }
}

Step 4: Summing Odd Numbers

Now we include in the code for summing the odd numbers. We first need a variable where we can save the sum. We then add each odd number we find to this sum variable.

Here's our function with code for summing odd numbers:

function findSumOddNumbersRange(start, end) {
    let sum = 0;
    
    for(let i = start; i <= end; i++){
        if(i % 2 !== 0){
            sum += i;
        }
    }
}

Step 5: Return the Sum

The last thing we need to do is return the calculated sum from the function. This is needed because we want to have access to the result of our function outside the function.

Here's the final version of the function:

function findSumOddNumbersRange(start, end) {
    let sum = 0;
    
    for(let i = start; i <= end; i++){
        if(i % 2 !== 0){
            sum += i;
        }
    }
    
    return sum;
}

Conclusion

And that's it! We have a working function that calculates and returns the sum of all odd numbers within a given range. With the help of a simple for loop and dynamic programming, we're able to iterate through a list of numbers, check if each number is odd, and sum those numbers up. It might seem simple, but mastering such basic tasks is crucial for solving more complex problems. So, understanding each step is important for your growth as a programmer.