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


 
{E}           -> 2.718281828459045
{PI}          -> 3.141592653589793
{sqrt 2}      -> 1.4142135623730951
{log {E}}     -> 1
{exp 1}       -> 2.718281828459045
{abs -1}      -> 1
{floor -2.5}  -> -3
{ceil -2.5}   -> -2 
{pow 2.5 3.5} -> 24.705294220065465
 