The **`sqrt()` function** in Pythonreturns the *square root* of a non-negative number. 

Figure 1 shows the mathematical representation of the `sqrt()` function.

> The `math` module is required to use this function.

# Syntax
```python
sqrt(number)
```
# Parameter
`sqrt()` requires a non-negative number as a parameter.

# Return value
`sqrt()` returns the square root of the number sent as a parameter. 

# Example

import math

#perfect square root
print "sqrt(4):", math.sqrt(4)

print "sqrt(0):", math.sqrt(0)

#simple number
print "sqrt(5):", math.sqrt(5)

print "sqrt(4.5):", math.sqrt(4.5)


What is math.sqrt() in Python?

math.sqrt() returns the square root of a non-negative number using the math module.