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Python - math.sqrt() method example
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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