Math function to calculate age.

How to Create an Age Calculator Function in Function Calculator

One practical function you can create in Function Calculator is an age calculator.

With just a few lines of code, you can calculate a person’s age from their birth year.

Step 1: Understand the now() function

In Function Calculator, the built-in function now() returns the current date and time as a 14-digit integer in the format:

YYYYMMDDHHMMSS

For example:

20250915162430

represents 2025-09-15 16:24:30 (4:24:30 pm).

Step 2: Extract the current year

Since the first four digits represent the year, we can isolate them by dividing the number by 10^10 and applying floor().

def year() {

    var date = now();

    return floor(date / 10^10);

}

This function takes the 14-digit number from now(), removes the last 10 digits (month, day, time), and leaves only the year.

For example:

floor(20250915162430 / 10^10) = 2025

Step 3: Create the age function

Now, we can calculate age by subtracting the birth year from the current year:

def age(birthYear) {

    var thisYear = year();

    return thisYear - birthYear;

}

---

Step 4: Use the function

For example:

age(1990)

will return:

35

if the current year is 2025.

After coding  don't forget to press run button to implement your code and press save button for later use the function.

This is a simple but powerful way to build practical everyday functions with Function Calculator.