How to use the ATN Function (VBA)

Description

The Microsoft Excel ATN function returns the arctangent of a number.

Syntax

The syntax for the ATN function in Microsoft Excel is:

Atn( number )

Parameters or Arguments

number

A numeric expression that is used to calculate the arctangent.

Applies To

• Excel 2016, Excel 2013, Excel 2011 for Mac, Excel 2010, Excel 2007, Excel 2003, Excel XP, Excel 2000

Type of Function

• VBA function (VBA)

Example (as VBA Function)

The ATN function can only be used in VBA code in Microsoft Excel.

Let's look at some Excel ATN function examples and explore how to use the ATN function in Excel VBA code:

Atn(2)
Result: 1.10714871779409

Atn(2.51)
Result: 1.19166451926354

Atn(-3.25)
Result: -1.27229739520872

For example:

Dim LNumber As Double

LNumber = Atn(210)

In this example, the variable called LNumber would now contain the value of 1.56603445802574.