Cost calculation algorithm in javascript

Question

Cost calculation algorithm in javascript

Currently struggling with creating a code that my friend and I were assigned. The task is to calculate and return the average of all values in an array called customerBalance. This array represents the amount customers owe my fictional business, with each item in the array representing a customer's balance. The goal is to use a for loop to process the array, calculate the average by dividing the sum by the length of the customerBalance array, and then return this average.

This is what I have attempted so far:

function average() {
    customerBalance
    for(i=0,i++)
      sum(customerBalance)
    total=sum/5

return average;

I am aware that this code is completely wrong. I am unsure how to properly work with arrays and would appreciate any guidance on how to approach this problem. Your help is greatly appreciated!

Thank you and have a wonderful day

javascript arrays

Answer 1

Answer №1

function calculateAverage(customerBalance) {
    if (customerBalance.length == 0) { // Avoiding division by zero later on
        return 0;
    }
    var total = 0;
    for (var i = 0; i < customerBalance.length; i++) {
        total += customerBalance[i];
    }
    var result = total/customerBalance.length;
    return result;
}

You are facing several issues:

The parameter should be placed inside the parentheses after the function name, not on the next line.
Your for() loop syntax is incorrect. Separate the initialization, repetition test, and increment with semicolons.
There is no sum() function in JavaScript. If such a function existed, you would need to assign the result to a variable.
When calculating the average, you are storing it in total, but then returning average, which actually holds the function itself rather than the calculated average.

Additional suggestions:

Avoid hard-coding the array size; use array.length instead.
Always include braces around the body of for, if, while, etc., even for single-line statements.
Declare local variables using var.

Answer 2

function calculateAverage(customerBalance) {
    if (customerBalance.length == 0) { // Avoiding division by zero later on
        return 0;
    }
    var total = 0;
    for (var i = 0; i < customerBalance.length; i++) {
        total += customerBalance[i];
    }
    var result = total/customerBalance.length;
    return result;
}

You are facing several issues:

The parameter should be placed inside the parentheses after the function name, not on the next line.
Your for() loop syntax is incorrect. Separate the initialization, repetition test, and increment with semicolons.
There is no sum() function in JavaScript. If such a function existed, you would need to assign the result to a variable.
When calculating the average, you are storing it in total, but then returning average, which actually holds the function itself rather than the calculated average.

Additional suggestions:

Avoid hard-coding the array size; use array.length instead.
Always include braces around the body of for, if, while, etc., even for single-line statements.
Declare local variables using var.

Cost calculation algorithm in javascript

Answer №1

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