| 10 REM "Calculate the first N prime numbers" | |
| 20 REM "and output them!" | |
| 30 REM "This version uses @ and BREAK" | |
| 100 REM "Preallocate all vars before using @()" | |
| 110 N=0: K=0: L=0: J=0: I=0 | |
| 200 INPUT "How many primes (0=stop)? ", N | |
| 210 IF N=0 THEN END | |
| 220 IF N>@ THEN PRINT "Maximum is ", @ : GOTO 200 | |
| 230 @(1)=2: @(2)=3 | |
| 240 FOR I=3 TO N | |
| 250 K=@(I-1)+2 | |
| 260 L=SQR(K) | |
| 270 FOR J=1 | |
| 280 IF K%@(J)=0 THEN K=K+2 : GOTO 260 | |
| 290 IF @(J)>L THEN BREAK | |
| 300 NEXT J | |
| 310 @(I)=K | |
| 320 NEXT I | |
| 360 PRINT "The first", N, "primes are:" | |
| 370 FOR J=1 TO N | |
| 380 PRINT J, @(J) | |
| 390 NEXT | |
| 400 GOTO 200 | |
| 500 END | |