TANH
TANH(expr)
Description
The TANH function is used to calculate the hyperbolic tangent of a given numerical expression expr, and returns the result as the hyperbolic tangent value.
Parameter Description
expr: The numerical expression to be calculated, of type double.
Return Result
Returns the hyperbolic tangent value of the calculation result, of type double.
Usage Example
-- Calculate the hyperbolic tangent of 0
> SELECT TANH(0);
0.0
-- Calculate the hyperbolic tangent of 1
> SELECT TANH(1);
0.7615941559557649
-- Calculate the hyperbolic tangent of -1
> SELECT TANH(-1);
-0.7615941559557649
-- Calculate the hyperbolic tangent of a negative value -2
> SELECT TANH(-2);
0.9640275800758169
-- Calculate the hyperbolic tangent of a large positive value 5
> SELECT TANH(5);
0.9999092042625951
-- Calculate the hyperbolic tangent of a small negative value -0.5
> SELECT TANH(-0.5);
-0.46211715726
