The math.sqrt() function calculates the square root of a number.

math.sqrt(x)

Where, is  number for which the square root should be calculated.

The function returns   square root of the given number  as a a floating point value.

import math
print(math.sqrt(4))
print(math.sqrt(7))
print(math.sqrt(16))
print(math.sqrt(30))
print(math.sqrt(625))

If the given number is less than 0, a ValueError is raised.

import math

print(math.sqrt(-2))