sqrt()

Returns the positive square root of the specified number.

Syntax

Parameters

NUM_EXPR

The number whose square root is to be computed. Must be a numeric type.

Description

The sqrt() function returns the positive square root of NUM_EXPR as a 64-bit double. Internally uses Math.sqrt().

Returns null if NUM_EXPR is null or not a numeric type. Returns NaN if the input is negative.

Error codes

N/A

Usage examples

1. Calculate the square root of 4.

   json "{}" | eval s = sqrt(4)
   | # s: 2.0
   

2. Calculate the square root of 2.

   json "{}" | eval s = sqrt(2)
   | # s: 1.4142135623730951
   

3. A negative input returns NaN.

   json "{}" | eval s = sqrt(-1)
   | # No result (NaN cannot be serialized to JSON, so an empty result is returned)
   

4. NULL input

   json "{}" | eval s = sqrt(null)
   | # s: null
   

Compatibility

The sqrt() function is available since before Sonar 4.0.