Task

Show how to use the following math constants and functions in your language   (if not available, note it):

   e   (base of the natural logarithm)
   



π


{\displaystyle \pi }


   square root
   logarithm   (any base allowed)
   exponential   (ex )
   absolute value   (a.k.a. "magnitude")
   floor   (largest integer less than or equal to this number--not the same as truncate or int)
   ceiling   (smallest integer not less than this number--not the same as round up)
   power   (xy )


Related task

   Trigonometric Functions


REAL x:=exp(1), y:=4*atan(1);
printf(($g(-8,5)"; "$,
    exp(1),    # e #
    pi,        # pi #
    sqrt(x),   # square root #
    log(x),    # logarithm base 10 #
    ln(x),     # natural logarithm #
    exp(x),    # exponential #
    ABS x,     # absolute value #
    ENTIER x,  # floor #
   -ENTIER -x, # ceiling #
    x ** y     # power #
))