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Louis Espinoza
1,010 PointsHow to calculate the numbers of seconds I've been alive?
Hi, I I am not entirely sure how to calculate the number of seconds I've been alive for? Would it be
var secondsPerMin = 60;
var minsPerHour = 60;
var hoursPerDay = 24;
var daysPerWeek = 7;
var weeksPerYear = 52
var yearsAlive = 25;
var secondsAlive = secondsPerMIn * minsPerHour * hoursPerDay * daysPerWeek * weeksPerYear;
alert("I've been alive for more than " + secondsAlive + ' seconds');
I don't think that is right but how do you know what to calculate in order to get the right answer? What if I wanted to calculate the number of days until my next birthday as mentioned in the video? How would go about performing those calculations?
Sorry. Math isn't my strong suit
6 Answers
zainsra7
3,237 PointsHi Louis,
I learned these kind of concept in following way:
- When you want to go from smaller unit to a greater unit, you divide.
I have 3500 grams and I want to know how many Kilograms it's ( I do know that 1 kg = 1000 g) , so as I am going from small (gram) to greater (kilogram) I will divide 3500 / 1000 = > which will give be 3.5 kg.
Now same example with Time, I need to convert 5600 seconds (small) to minutes (large) , so I will again divide 5600 with the number of seconds in a minute which are 60 .. so 5600/60 => 93.33 minutes and then 93.33 / 60 => 1.5 hour
So , 5600 seconds are equal to 93.33 minutes and 1.5 hour.
- When you want to go from greater unit to smaller unit, you multiply.
How many seconds in 1.5 hour?
1.5 * 60 (minutes in an hour) = > 93.33 mins
93.33 * 60 (seconds in a minute) => 5600 seconds
Now to answer your query about how many seconds you have been alive , let's see that:
How old are you ? 25 years.
Years -> weeks => 25*52 = 1300 weeks
weeks -> days => 1300*7 = 9100 days
days -> hours => 9100 * 24 = 218,400 hours
hours -> minutes => 218,400 * 60 = 13,104,000 mins
minutes -> seconds => 13,104,000 * 60 = 786,240,000 seconds
Wow that's a lot of seconds :D
I hope it clears your concept of conversion from one smaller unit to a greater unit and vice versa.
Happy learning :)
- Zain
Louis Espinoza
1,010 PointsHey Zain!
Thank you for taking the time to post this. It really helped me out a lot.
Riaz Khan
5,320 Pointsawesome explanation!
immad Ud din
Front End Web Development Techdegree Student 14,756 PointsGood explanation of the logic behind that simple mathematics.
Alexandra Edwards
4,686 PointsI just realized I added this answer as a comment by accident. Oops, Treehouse Newbie mistake. Here was what I had that was in the wrong spot:
You're so close! How about making the corrections in the comment line below:
var secondsPerMin = 60;
var minsPerHour = 60;
var hoursPerDay = 24;
var daysPerWeek = 7;
var weeksPerYear = 52
var yearsAlive = 25;
// lower case 'i' on secondsPerMin and multiply the variable yearsAlive after weeksPerYear
var secondsAlive = secondsPerMIn * minsPerHour * hoursPerDay * daysPerWeek * weeksPerYear;
alert("I've been alive for more than " + secondsAlive + ' seconds');
Tiffany McFarlane
5,364 PointsI have finally figured it out
var secondsPerMin = 60; var minsPerHour = 60; var housPerDay = 24; var daysPerWeek = 7; var weeksPerYear = 52; var yourAge = 27;
var secondsPerDay = secondsPerMin * minsPerHour * housPerDay; document.write('There are ' + secondsPerDay + ' seconds in a day. '); var secondsPerWeek = secondsPerDay * daysPerWeek; var secondsPerYear = secondsPerWeek * weeksPerYear; var yearsAlive = secondsPerYear * yourAge; document.write('<h2>I have been alive for more than ' + yearsAlive + ' seconds.</h2>');
Soon Han Ooi
Courses Plus Student 1,062 PointsWhat is the easiest way to add photos here? I would like to post my answer here too.
Mark Wowor
Front End Web Development Techdegree Student 14,630 PointsHere's my calculation.
var secondsPerMin = 60;
var minsPerHour = 60;
var hoursPerDay = 24;
var daysPerWeek = 7;
var weeksPerYear = 52;
var yourAge = 24;
var secondsPerDay = secondsPerMin * minsPerHour * hoursPerDay;
var secondsPerWeek = secondsPerDay * daysPerWeek;
var secondsPerYear = secondsPerWeek * weeksPerYear
var yearsAlive = secondsPerYear * yourAge;
document.write(`<h2>I have been alive for ${yearsAlive} seconds.</h2>`);
Joshua Lee
Full Stack JavaScript Techdegree Student 3,266 PointsThis was my code that I went with
var secondsPerMin = 60;
var minsPerHour = 60;
var hoursPerDay = 24;
var daysPerWeek = 7;
var weeksPerYear = 52;
var secondsPerDay = secondsPerMin * minsPerHour * hoursPerDay;
var secondsPerWeek = secondsPerDay * daysPerWeek;
var secondsPerYear = secondsPerWeek * weeksPerYear;
var yearsAlive = secondsPerYear * 28;
document.write("There are " + secondsPerDay + " seconds in a day </br>");
document.write('There are ' + secondsPerWeek + ' seconds per week </br>');
document.write('There are ' + secondsPerYear + ' seconds per year </br>');
document.write('I\'ve been alive for more than ' + yearsAlive + ' seconds');
Gabriel de leon
1,611 PointsGabriel de leon
1,611 PointsWhat you were actually missing was just one multiplication. You needed to add a multiplication for yearsAlive;
var secondsAlive = secondsPerMIn * minsPerHour * hoursPerDay * daysPerWeek * weeksPerYear * yearsAlive;
That would have given you the amount of seconds in a year.