How to express root sign in python

sqrt() method returns the square root of the number x.

The following is the syntax of the sqrt() method: (Recommended learning: Python video tutorial)

import math

math.sqrt( x )

Note: sqrt() cannot be accessed directly. You need to import the math module and call this method through a static object.

Parameters

x -- Numeric expression.

Return value

Returns the square root of the number x.

Example

The following shows an example of using the sqrt() method:

#!/usr/bin/python
import math   # This will import math module

print "math.sqrt(100) : ", math.sqrt(100)
print "math.sqrt(7) : ", math.sqrt(7)
print "math.sqrt(math.pi) : ", math.sqrt(math.pi)

The output result after running the above example is:

math.sqrt(100) :  10.0
math.sqrt(7) :  2.64575131106
math.sqrt(math.pi) :  1.77245385091

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