This simple code crashes my browser completely!

Question

Okay so its a simple bit of code that I was doing just to experiment with JavaScript. I've worked with a few different programming languages before mostly C# and Java, but a few others as well, and things similar to this have always been go-to's for figuring out syntax and how to make things work in a new language, so I was trying something similar in JavaScript and for some reason it crashes my browser.

Not in a small, page stops responding kind of way, but full on chrome freezes for 5 minutes while I wait for it to officially "stop responding" so I can kill it. (I'm on a work pc so no CTRL + ALT + DEL and no Task Manager...).

I'm probably just overlooking something simple somewhere but I just can't see it. And it doesn't help that workspaces lacks proper debugging tools, from what I've found.

So here is the JavaScript:

/*
  Assumptions:
    40 hours of work a week
    50 weeks out of the year
*/

var hourly = 15;
var expenses = 12000; //$2000 per month / 2 people = 1000 * 12 months = 12000
var splurge = 7800; // $150 splurge per week * 52 weeks in a year = 7800
var savings = 0;
var apy = 0.0075; // assuming an apy around 0.75% = 0.0075

var income;
var currYear;

function main(){
 console.log("begin calculations"); 

  for(currYear = 1; currYear < 37; currYear++){
    console.log("year: " + currYear);

    //update the values that change on certain years
    if (currYear = 2) hourly = 20;
    else if (currYear = 4) hourly = 25;
    else if (currYear = 6) hourly = 30;
    else if (currYear = 10) hourly = 40;
    else if (currYear = 15) hourly = 50;
    else if (currYear = 20) hourly = 60;
    else if (currYear = 25) hourly = 75;
    else if (currYear = 30) hourly = 100;

     //do the required calculations every year
    CalculateExpenses();
    CalculateIncome();
    CalculateSavings();

    document.write("In year " + currYear + ", you would earn $" + income +
                  ". Your expenses would be $" + expenses + 
                  ", leaving you with $" + (income - expenses) + 
                  ". After splurge funds are removed you would have $" + 
                  (income - expenses - splurge) + " to put into savings." +
                  "Your new savings total after APY would be $" + savings +
                  ".");
    document.write("<br>");
  }
}

function CalculateExpenses(){
  //Assume a slight yearly increase in expenses of 1% per year.
  expenses = expenses + (expenses * 0.01);
}

function CalculateIncome(){
  // calculate the income based on the hourly rate 
  income = hourly * 2000; // 40 hours * 50 weeks = 2000 
}

function CalculateSavings(){
  // add income to savings account
  // calculate interest on new savings account balance
  // add the interest to the savings account
}

main();

Answer 1 · 2017-06-08T21:07:15Z

June 8, 2017 9:07pm

In your series of conditions to currYear. Your reaffecting the value of currYear (which ends in an infinite loop).

What you want to do is compare, so you need to use the comparison operator "==", like this :

    if (currYear == 2) hourly = 20;
    else if (currYear == 4) hourly = 25;
    else if (currYear == 6) hourly = 30;
    else if (currYear == 10) hourly = 40;
    else if (currYear == 15) hourly = 50;
    else if (currYear == 20) hourly = 60;
    else if (currYear == 25) hourly = 75;
    else if (currYear == 30) hourly = 100;

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evannex

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This simple code crashes my browser completely!

1 Answer

Christopher Debove

Christopher Debove

evannex

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