PI _ _ _ _ _ _ _ _ _ _ _ _ constant

The identifier pi is reserved for use as the circular constant. Its value is given by 3.14159265358..., which REDUCE gives to the current decimal precision when REDUCE is in a floating-point mode.

pimay be used as a looping variable in a for statement, or as a local variable in a procedure. Its value in such cases will be taken from the local environment.