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In this article, you will be learning how to find square roots in Python and what are the popular square root functions in Python.

## What is a Square root?

Square root, in mathematics, **is a factor of a number that, when multiplied by itself, gives the original number**. For example, both 3 and –3 are square roots of 9.

## How to calculate the Square root in Python?

The math module in Python has ** sqrt()** and

**functions, using which you can calculate the square root of a given number.**

`pow()`

**Using sqrt() function**

The ** sqrt()** function takes one parameter and returns the square root of the provided number.

**Syntax:**

*sqrt(x) *# x is the number whose square root needs to be calculated.

**Example**

Let’s take a various and find the square root of a decimal, positive number, zero.

```
# Import math module
import math
# calculate square root of given number
print(math.sqrt(25))
# square root of 10
print(math.sqrt(10))
# square root of 0
print(math.sqrt(0))
# square root of decimal number
print(math.sqrt(4.5))
```

**Output**

```
5.0
3.1622776601683795
0.0
2.1213203435596424
```

The ** sqrt()** method can take only positive numbers in case if you provide the negative number you will get a

**ValueError**as shown below.

```
# Import math module
import math
# calculate square root of negative number
print(math.sqrt(-33))
```

**Output**

```
Traceback (most recent call last):
File "c:\Projects\Tryouts\main.py", line 5, in <module>
print(math.sqrt(-33))
ValueError: math domain error
```

**Using pow() function**

The** pow()** method can be used to compute the square root of any number. This

**function takes two parameters and multiplies them to compute the results. This is done in order to the mathematical equation where,**

`pow()`

**x2 = y or y=x**.5**

The syntax of this function is as follows:

**Syntax**

*pow(x,y) *# where y is the power of x or x**y

```
# Import math module
import math
# calculate square root of given number
print(math.pow(25,0.5))
# square root of 10
print(math.pow(10,0.5))
# square root of 0
print(math.pow(0,0.5))
# square root of decimal number
print(math.pow(4.5,0.5))
```

**Output**

```
5.0
3.1622776601683795
0.0
2.1213203435596424
```