# Using the `Sqrt()` function from the math module

1. Import the math module using import math at the beginning of the program

3.  Find out the square root of the number using `math.sqrt(number)` method

4. Note that it throws an error if a negative number is passed

import math

print(math.sqrt(19))

# Throws an error if a negative number is passed
#print(math.sqrt(-19))

# Writing a function

1.  Create a function that takes one argument

1. Then, if the number is negative, return nothing. (Imaginary numbers are another topic for another shot)

3. Now, as a square root of a number is simply the number raised to the power 0.5,  raise the given number to the power of 0.5 using the following syntax:

$$number^{exponent} = $$ 
```
                         number**exponent
```

4. This will give us the square root of the number; return it


5. Finally, print out the result to the user

def sqrt(n):
  if n < 0:
    return
  else:
    return n**0.5
  
print(sqrt(19))

How to take the square root of a number in Python

Use the math module's `sqrt()` function, or raise a number to 0.5 power for square roots. Avoid negative inputs.

How to take the square root of a number in Python

Using the Sqrt() function from the math module

Writing a function

Using the `Sqrt()` function from the math module