In Haskell, you can get the square root of a number using the sqrt function from the Prelude module.
Here's an example of how to get the square root of a number in Haskell:
-- Import the Prelude module to use the sqrt function.
import Prelude
-- Example function to get the square root of a number.
getSquareRoot :: Double -> Double
getSquareRoot x = sqrt x
-- Call the getSquareRoot function with an example value.
result = getSquareRoot 16.0
-- The result will be 4.0.
In the above example, we first import the Prelude module to use the sqrt function. We then define a function called getSquareRoot which takes a Double parameter x and returns the square root of x using the sqrt function. We then call the getSquareRoot function with an example value of 16.0 and store the result in the result variable. The result will be 4.0.