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JavaScript JavaScript Numbers Working with Numbers Create a Program with Math

Damien Lavizzo
Damien Lavizzo
4,265 Points
Posted by Damien Lavizzo
Damien Lavizzo
4,265 Points

My Solution (no console logging)

I'm lazy and I hate hitting F12 every time to check the console, so I used what I learned from another lesson and logged everything right to the Main element.

(The function toLocaleString converts the number to a string and adds proper seperators. I found this in Mozilla's developer reference guide for Javascript.) 

const secsPerMin = 60;
const minsPerHour = 60;
const hoursPerDay = 24;
const daysPerWeek = 7;
const weeksPerYear = 52;

const secondsPerDay = secsPerMin * minsPerHour * hoursPerDay;
const secondsPerYear = secondsPerDay * 365

let currentAge = prompt("Please input your age:")
let ageInSeconds = currentAge * secondsPerYear
let ageInWeeks = (currentAge * weeksPerYear).toLocaleString()

document.querySelector('main').innerHTML = `<h2>There are: ${secondsPerDay.toLocaleString()} seconds per day.</h2>
<p>You have been alive for approximately <strong>${ageInSeconds.toLocaleString()}</strong> seconds.
<p>In weeks this would be approximately <strong>${ageInWeeks} weeks.`;

1 Answer

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

Be aware that this only works in a browser. The original code (using console.log) would also run in a host-based JavaScript engine such as node.js, but this would not.

But this is a very useful technique in front-end development, and as you say will be covered in other lessons.

Damien Lavizzo
Damien Lavizzo
4,265 Points
Damien Lavizzo
Damien Lavizzo
4,265 Points

I didn't know that, thanks for that! Seems like something that's good to know depending on your use case. Very much appreciated.