## Age calculation in months or years

Explorer ,
Jun 04, 2019

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I am using a calculation script to calculate age from a DOB field. It works just fine for the calculation and I can manipulate it to calc either in months or years. The problem is I want to have any ages < 1 year old to show the age in months and ages > 1 year old to show the age in years. Hopefully that makes sense. I have been searching through the existing threads and can't seem to find anything to help this specific need. If there a way to do this - maybe an additional IF clause? Here is my current calculation script.

event.value = "";

var dobValue = getField("Kid.DOB").value;

if (dobValue!="") {

var dob = util.scand("mm/dd/yyyy", dobValue);

var today = new Date();

// compute age in milliseconds

var age = today.getTime() - dob.getTime();

// convert age to years ( millsec in sec * sec in min * min in hrs * hrs in day * days in year)

// truncate to whole years and adjust for binary floating point error

event.value = Math.floor( age / (1000 * 60 * 60 * 24 * 365.2425) - 0.005);

}

If I want calculate in months, I change the 365.2425 to 30.436.

Ok, I found the missing variable and that what was causing the problem. Here is the final script for anyone who wants it.

event.value = "";

var dobValue = getField("Kid.DOB").value;

if (dobValue!="") {

var dob = util.scand("mm/dd/yyyy", dobValue);

var today = new Date();

var age = today.getTime() - dob.getTime();

// compute age in milliseconds

var nAgeMilliseconds = today.getTime() - dob.getTime();

var nAgeYears = ( age / (1000 * 60 * 60 * 24 * 365.2425) - 0.005);

if(nAgeYears < 1)

{// Change to months (tricky because you have to handle new year crosing)

var nAgeMonths = today.getMonth() - dob.getMonth();

if(nAgeMonths < 0)

nAgeMonths += 12;

event.value = Math.floor(nAgeMonths);

}

else

event.value = Math.floor(nAgeYears);

}

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Acrobat SDK and JavaScript

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## Age calculation in months or years

Explorer ,
Jun 04, 2019

Copied

I am using a calculation script to calculate age from a DOB field. It works just fine for the calculation and I can manipulate it to calc either in months or years. The problem is I want to have any ages < 1 year old to show the age in months and ages > 1 year old to show the age in years. Hopefully that makes sense. I have been searching through the existing threads and can't seem to find anything to help this specific need. If there a way to do this - maybe an additional IF clause? Here is my current calculation script.

event.value = "";

var dobValue = getField("Kid.DOB").value;

if (dobValue!="") {

var dob = util.scand("mm/dd/yyyy", dobValue);

var today = new Date();

// compute age in milliseconds

var age = today.getTime() - dob.getTime();

// convert age to years ( millsec in sec * sec in min * min in hrs * hrs in day * days in year)

// truncate to whole years and adjust for binary floating point error

event.value = Math.floor( age / (1000 * 60 * 60 * 24 * 365.2425) - 0.005);

}

If I want calculate in months, I change the 365.2425 to 30.436.

Ok, I found the missing variable and that what was causing the problem. Here is the final script for anyone who wants it.

event.value = "";

var dobValue = getField("Kid.DOB").value;

if (dobValue!="") {

var dob = util.scand("mm/dd/yyyy", dobValue);

var today = new Date();

var age = today.getTime() - dob.getTime();

// compute age in milliseconds

var nAgeMilliseconds = today.getTime() - dob.getTime();

var nAgeYears = ( age / (1000 * 60 * 60 * 24 * 365.2425) - 0.005);

if(nAgeYears < 1)

{// Change to months (tricky because you have to handle new year crosing)

var nAgeMonths = today.getMonth() - dob.getMonth();

if(nAgeMonths < 0)

nAgeMonths += 12;

event.value = Math.floor(nAgeMonths);

}

else

event.value = Math.floor(nAgeYears);

}

TOPICS
Acrobat SDK and JavaScript

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Jun 04, 2019 0
14 Replies 14
Most Valuable Participant ,
Jun 04, 2019

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So the current result is in years? If so you can add an if-statement that if it's less then 1, multiply the value by 12 to get the number of months. However, for that you will need to remove the Math.floor command, as that rounds the result down...

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Jun 04, 2019 0
Explorer ,
Jun 04, 2019

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I'm still new to JavaScript and since I borrowed this script from someone else, I'm going to need help replacing that math.floor command and adding the IF statement. I've tried some probably very bad attempts to add another IF and haven't been able to make anything work. I've also tried using the following script, but still can't get the age calc I want. Which scrip would be better? This one doesn't have the math.floor command in it, but would still need the additional IF statement.

event.value = "";

dobValue = getField("Kid.DOB").value;

if (dobValue!="") {

dob = util.scand("mm/dd/yyyy", dobValue);

today = new Date();

age = today.getFullYear() - dob.getFullYear();

if (today.getMonth() < dob.getMonth())

age;

else if (today.getMonth()== dob.getMonth())

age;

else if (today.getDate() < dob.getDate())

age;

else if (today.getDate() == dob.getDate())

age;

event.value = age;

}

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Jun 04, 2019 0
Jun 05, 2019

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The first thing you need to do is decide on the conditions for the various results you want, Then figure out the calculations. It sounds like all you need to know is if the "age" is less than a year, in order do determine how the result is displayed.  The code in your first post is closer to the mark.

Here is an outline using the previous calculation

var nAgeMilliseconds = today.getTime() - dob.getTime();

var nAgeYears = ( age / (1000 * 60 * 60 * 24 * 365.2425) - 0.005);

if(nAgeYears < 1)

{// Change to months (tricky because you have to handle new year crosing)

var nAgeMonths = today.getMonth() - dob.getMonth();

if(nAgeMonths < 0)

nAgeMonths += 12;

event.value = Math.floor(nAgeMonths);

}

else

event.value = Math.floor(nAgeYears);

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Jun 05, 2019 0
Explorer ,
Jun 05, 2019

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I thought it was working but now it won't show the answer at all. I don't know what I did. Here is what I am using now. My machine might be acting up.

event.value = "";

var dobValue = getField("Kid.DOB").value;

if (dobValue!="") {

var dob = util.scand("mm/dd/yyyy", dobValue);

var today = new Date();

// compute age in milliseconds

var nAgeMilliseconds = today.getTime() - dob.getTime();

var nAgeYears = ( age / (1000 * 60 * 60 * 24 * 365.2425) - 0.005);

if(nAgeYears < 1)

{// Change to months (tricky because you have to handle new year crosing)

var nAgeMonths = today.getMonth() - dob.getMonth();

if(nAgeMonths < 0)

nAgeMonths += 12;

event.value = Math.floor(nAgeMonths);

}

else

event.value = Math.floor(nAgeYears);

}

Am I missing something?

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Jun 05, 2019 0
Jun 05, 2019

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Yes, the "if(dobValue!="") does not have a matching parentheses.

Did you look in the console window to see if any errors are reported? It would have indicated this exact syntax issue.

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Jun 05, 2019 0
Explorer ,
Jun 05, 2019

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There are parenthesis and there was no syntax error. Everything is exactly like I posted it. The scrip just won't do the calculation at all with the way it's written now.

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Jun 05, 2019 0
Jun 05, 2019

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Ok, the parenthesis are balanced, but there is an error.

"ReferenceError: age is not defined"

The "nAgeYears" calc contains a variable that doesn't exist.

You need to do some debug.

Here's an article that will help

And a video

Both are a little out of date, but the content is still valid.

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Jun 05, 2019 0
Explorer ,
Jun 06, 2019

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Ok, I found the missing variable and that what was causing the problem. Here is the final script for anyone who wants it.

event.value = "";

var dobValue = getField("Kid.DOB").value;

if (dobValue!="") {

var dob = util.scand("mm/dd/yyyy", dobValue);

var today = new Date();

var age = today.getTime() - dob.getTime();

// compute age in milliseconds

var nAgeMilliseconds = today.getTime() - dob.getTime();

var nAgeYears = ( age / (1000 * 60 * 60 * 24 * 365.2425) - 0.005);

if(nAgeYears < 1)

{// Change to months (tricky because you have to handle new year crosing)

var nAgeMonths = today.getMonth() - dob.getMonth();

if(nAgeMonths < 0)

nAgeMonths += 12;

event.value = Math.floor(nAgeMonths);

}

else

event.value = Math.floor(nAgeYears);

}

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Jun 06, 2019 0
Jun 06, 2019

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You just repeated the line that calcualates the age in milliseconds.  The nAgeMilliseconds parameter was already there, you should have either used it or removed the line.

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Jun 06, 2019 0
Explorer ,
Jul 18, 2019

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Ok Thom,

Now for an extension of this question. For ages that are  less than 1 month, I would like the calculation to show how many weeks old they are. I have used your original script as a starting point and the script does recognize when it should be showing weeks, but there is something wrong with it actually showing the number of weeks. For example, when nAgeMonths < 1, it will change the text part of the event value from Months to Weeks, but it will show 0 weeks instead of the actually number of weeks. I hope that makes sense. I think the problem may be in one of two areas:

var nAgeWeeks = today.getMonth() - dob.getMonth(); // shouldn't this be changed since we're not using complete months?

or

nAgeWeeks += 4; //should this be something other than 4? I've tried 52 but it still showed 0 weeks at the end.

Here is the entire script to look at

event.value = "";

var dobValue = getField("Kid.DOB").value;

if (dobValue!="") {

var dob = util.scand("mm/dd/yyyy", dobValue);

var today = new Date();

var age = today.getTime() - dob.getTime();

// compute age in milliseconds

var nAgeYears = ( age / (1000 * 60 * 60 * 24 * 365.2425) - 0.005);

if(nAgeYears < 1) {

var nAgeMonths = today.getMonth() - dob.getMonth();

if(nAgeMonths < 0)

nAgeMonths += 12;

event.value = Math.floor(nAgeMonths) + " Months";

if(nAgeMonths < 1) {

var nAgeWeeks = today.getMonth() - dob.getMonth();

if(nAgeWeeks < 0)

nAgeWeeks += 4;

event.value = Math.floor(nAgeWeeks) + " Weeks";

}

}

else

event.value = Math.floor(nAgeYears) + " Years";

}

I hope all that makes sense.

Thanks, Todd

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Jul 18, 2019 0
Jul 18, 2019

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Hi Todd,

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Jul 18, 2019 0
Explorer ,
Jul 18, 2019

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Jul 18, 2019 0
New Here ,
Jan 03, 2021

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Hi, Everyone!

Thanks for all of this valuable information!  I took a class on this in college, and my brain exploded.  I'm much better at troubleshooting physical machines.  Anyway, I digress..

I have tried the sript offered by todd, but while I receive no errors, my age cell populates nothing.  I think I'm missing a script in my DOB cell.  I changed the DOB title to what mine is called to no avail.  Could someone please help?  I just need to calcluate the Age based off of the user's input of the DOB.

Thank you in advance for any help!

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Jan 03, 2021 0
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Most Valuable Participant ,
Jan 03, 2021

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Did you check the JS Console? Did you update the value of the DOB field after applying the calculation script?

If the answer is yes to both questions and it's still not working, please share the actual file with us for further help with this issue.

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Jan 03, 2021 0