Strange numbers: Difference between revisions

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=={{header|RPL}}==

{{works with|Halcyon Calc|4.2.7}}

{| class="wikitable"

! RPL code

! Comment

|-

|

≪

'''IF''' DUP 10 < '''THEN''' DROP 0 '''ELSE'''

→STR → n

≪ 1 SF { 0 1 4 6 8 9 }

1 n SIZE 1 - '''FOR''' j

n j DUP SUB NUM n j 1 + DUP SUB NUM - ABS

'''IF''' OVER SWAP POS '''THEN''' 1 CF n SIZE 'j' STO '''END'''

'''NEXT'''

DROP 1 '''FS?'''

≫ '''END'''

≫ ''''STRG?'''' STO

|

'''STRG?''' '' n -- boolean ) ''

return false if n < 10

store locally n as a string

initialize return flag and list of non-prime numbers

scan n

get |n[j]-n[j+1]|

if not prime then clear flag and exit loop

return flag value

|}

{{in}}

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≪ {} 101 499 FOR j IF j STRG? THEN j + END NEXT ≫ EVAL

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{{out}}

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1: { 130 131 135 136 138 141 142 146 147 149 161 163 164 168 169 181 183 185 186 202 203 205 207 241 242 246 247 249 250 252 253 257 258 270 272 274 275 279 292 294 296 297 302 303 305 307 313 314 316 318 350 352 353 357 358 361 363 364 368 369 381 383 385 386 413 414 416 418 420 424 425 427 429 461 463 464 468 469 470 472 474 475 479 492 494 496 497 }