# Python 3 - Number atan() Method

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## Description

The atan() method returns the arc tangent of x, in radians.

## Syntax

Following is the syntax for atan() method −

```atan(x)
```

Note − This function is not accessible directly, so we need to import the math module and then we need to call this function using the math static object.

## Parameters

x − This must be a numeric value.

## Return Value

This method returns arc tangent of x, in radians.

## Example

The following example shows the usage of the atan() method.

```#!/usr/bin/python3
import math

print ("atan(0.64) : ",  math.atan(0.64))
print ("atan(0) : ",  math.atan(0))
print ("atan(10) : ",  math.atan(10))
print ("atan(-1) : ",  math.atan(-1))
print ("atan(1) : ",  math.atan(1))
```

## Output

When we run the above program, it produces the following result −

```atan(0.64) :  0.569313191101
atan(0) :  0.0
atan(10) :  1.4711276743
atan(-1) :  -0.785398163397
atan(1) :  0.785398163397
```
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