,L[]CASE ,PI ,EXAMPLES #A4 ,L[]CASE PI IS WRITT5 _% .P _: #B4 ;,C EQUALS TWO PI ;R IS WRITT5 _% ,C .K #2.PR _: #C4 ,OP5 FRAC;N FIVE PI OV] SIX CLOSE FRAC;N IS WRITT5 _% ?5.P/6# _: #A