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       ; e
pi      ; π
sqrt    ; square root
log10   ; common logarithm
log2    ; binary logarithm
        ; no exponential
        ; no absolute value
floor   ; greatest whole number smaller than or equal
ceil    ; smallest whole number greater than or equal
trunc   ; remove the fractional part (i.e. round towards 0)
round   ; round number to nth decimal place
pow     ; power