How to define functions with Xmart Calculator

 

In this video, we just define a function like this:

IncomeByDay(X) = X * 5 * 48,

Which will calculate the annual income by day rate (based on working 5 days a week, 48 weeks a year), where X is the day rate.

If your day rate is 300, then you can calculate your annual income in the main page like this:

  1. Tap the ‘f(x)’ button
  2. Tap ‘Custom’ at the bottom
  3. Scroll down to find the function ‘IncomeByDay..’ and tap it
  4. Enter an expression like this:

IncomeByDay(300)

Then you will see the result, instantly!