Python Number sqrt() Method



The sqrt() method in Python number returns the square root of x for the values where x > 0. This math function in Python i.e. sqrt() method comprises of a straightforward interface. It takes only one parameter i.e. x which signifies the square for which the user tries to calculate the square root. While executing this function the return value obtained in this case is the square root of the input number as a floating-point number.


Following is the syntax for sqrt() method:

import math

math.sqrt( x )

Note − This function is not accessible directly, so we need to import math module and then we need to call this function using math static object.


  • x − This is a numeric expression.

Return Value

This method returns square root of x for x > 0.


The following example shows the usage of sqrt() method.

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)

When we run above program, it produces following result:

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

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