
sqrt(+Number, -Result)
-Result is sqrt(+Number)

   Evaluates the square root sqrt(Number) and unifies the resulting value with
Result.



Arguments
   Number              A number.
   Result              Output: float or breal.

Type
   Arithmetic

Description

   Evaluates the square root sqrt(Number) and unifies the resulting value
   with Result.

   This predicate can be used as a function in arithmetic expressions.
   In coroutining mode, if Number is uninstantiated, the call to sqrt/2 is
   delayed until this variable is instantiated.




Modes and Determinism
   sqrt(+, -) is det

Exceptions
     4 --- Number is not instantiated (non-coroutining mode only).
    24 --- Number is not of a numeric type.
    20 --- Illegal arithmetic operation:  Number is negative.

Examples
   
Success:
    Result is sqrt(2.0).	% gives Result = 1.4142135623730951
    Result is sqrt(1.0).      	% gives Result = 1.0
    Result is sqrt(49).       	% gives Result = 7.0

Error:
    Result is sqrt(-2).         % arithmetic exception


See Also
   is / 2
