# math.atanh() method with example in Python

Python math.atanh() method: Here, we are going to learn about the math.atanh() method with example in Python.
Submitted by IncludeHelp, on April 25, 2019

## Python math.atanh() method

math.atanh() method is a library method of math module, it is used to get the hyperbolic arc tangent of given number in radians, it accepts a number and returns hyperbolic arc tangent.

Note: math.atanh() method accepts only numbers, if we provide any number which is not in the range it returns a ValueError"ValueError: math domain error", if we provide anything else except the number, it returns error TypeError"TypeError: a float is required".

Syntax of math.atanh() method:

```    math.atanh(x)
```

Parameter(s): x – is the number whose hyperbolic arc tangent to be calculated.

Return value: float – it returns a float value that is the hyperbolic arc tangent value of the number x.

Example:

```    Input:
x = .99

# function call
print(math.atanh(x))

Output:
2.6466524123622457
```

### Python code to demonstrate example of math.atanh() method

```# Python code to demonstrate example of
# math.atanh() method

# importing math module
import math

# number
x = -0.23
print("math.atanh(",x,"): ", math.atanh(x))

x = 0
print("math.atanh(",x,"): ", math.atanh(x))

x = .99
print("math.atanh(",x,"): ", math.atanh(x))
```

Output

```math.atanh( -0.23 ):  -0.2341894667593668
math.atanh( 0 ):  0.0
math.atanh( 0.99 ):  2.6466524123622457
```

ValueError example

```# Python code to demonstrate example of
# math.atanh() method with exception

# importing math module
import math

# number
x = -1
print("math.atanh(",x,"): ", math.atanh(x))
```

Output

```Traceback (most recent call last):
File "/home/main.py", line 9, in <module>
print("math.atanh(",x,"): ", math.atanh(x))
ValueError: math domain error
```

TypeError example

```# Python code to demonstrate example of
# math.atanh() method with exception

# importing math module
import math

# number
x = "2"
print("math.atanh(",x,"): ", math.atanh(x))
```

Output

```Traceback (most recent call last):
File "/home/main.py", line 9, in <module>
print("math.atanh(",x,"): ", math.atanh(x))
TypeError: a float is required
```

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