What is the purpose of the first two lines of this program? What do R and AR stand for?
1: R[1]=AR[1]
2: R[2]=AR[2]
3: IF R[2]=1, JMP LBL[3]
5: IF R[1]>1, JMP LBL[2]
6:
7: ! ROOT PASS
8: Track TAST[3] RPM[3]
9:L PR[3] 20mm/sec FINE
: Arc Start[99]
10: Weave Sine[99]
11:L P[4] WELD_SPEED FINE
: Arc End[99]
12: Weave End
13: Track End
14:J P[5] 10% FINE
15: END
16:
17: LBL[2:FORWARD PASSES
18: MP Offset PR[99]RPM[3]
19:J PR[3] 10% FINE
: Arc Start[99]
20: Weave Sine[99]
21:L P[4] WELD_SPEED FINE
: Arc End[99]
22: Weave End
23: MP Offset End