Happy PI Day on Commodore 64 | Calculating PI in Basic

Celebrating Pi Day on Commodore 64. Calculating PI in basic using Nilakantha Series method

0 rem computing pi number 10 print chr$(147) 20 k=2:p=3:s=4 30 forz=3to.step. 40 p=p+s/(k*(k+1)*(k+2)) 50 printchr$(147)"pi="p 60 k=k+2:s=-s 70 nextz

Calculating PI different methods: https://www.codeproject.com/Articles/813185/Calculating-the-Number-PI-Through-Infinite-Sequenc