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Python  math.sqrt() method example
0
points
math.sqrt
is a method that returns a number which is the square root of input value. The method works only on positive real numbers.
import math
print( math.sqrt( 4 ) ) # 2
print( math.sqrt( 9 ) ) # 3
print( math.sqrt( 2 ) ) # 1.4142135623730951
print( math.sqrt( 0.5 ) ) # 0.7071067811865476
print( math.sqrt( 0 ) ) # 0
print( math.sqrt( 1 ) ) # ValueError
1. Documentation
Syntax 

Parameters  x  number to find the square of. Value in the range 0 to infinity . 
Result 
Square root If the operation can not be executed 
Description  sqrt is a method that returns a number which is square root of input value. The method works only on positive real numbers. 
2. Square root with math.pow
method examples
In this example, the way how to calculate square root using power function is presented.
import math
def calculate_sqrt(value):
return math.pow(value, 0.5)
#Examples:
print( calculate_sqrt( 4 ) ) # 2
print( calculate_sqrt( 9 ) ) # 3
print( calculate_sqrt( 2 ) ) # 1.4142135623730951
print( calculate_sqrt( 0.5 ) ) # 0.7071067811865476
print( calculate_sqrt( 0 ) ) # 0
print( calculate_sqrt( 1 ) ) # ValueError