Precision

When working with numbers, and particularly with currencies, it is common to want to be able to express a number to a fixed precision

The methods:

• .round()
• .ceil()
• .floor()
• .trunc()

are provided for this purpose:

In this example the Current Salary of the node is being multiplied by 1.16

With no precision methods applied the result is shown with 11 decimal places

Round

The Math.round() function returns the value of a number rounded to the nearest specified integer

using the same example above with the round(2) method

node.math("currentsalary * 1.16").round(2) 

This rounds the result to 2 decimal places

round() can also use negative values in the brackets to round the value before the decimal point

node.math("currentsalary * 1.16").round(-2) 

Floor

The Math.floor() function returns the largest integer less than or equal to a given number effectively rounding down the value

node.math("currentsalary * 1.16").floor(2) 

node.math("currentsalary * 1.16").floor(-2)

Ceil

The Math.ceil() function rounds a number up to the next largest integer

node.math("currentsalary * 1.16").ceil(0)

node.math("currentsalary * 1.16").ceil(-3)

Trunc

The Math.trunc() function returns the integer part of a number by removing any fractional digits without applying any rounding

node.math("currentsalary * 1.16").trunc(3)

node.math("currentsalary * 1.16").trunc(-2)