DigitCount

DigitCount(n)

returns a list of the number of integer digits for n for radix 10.

DigitCount(n, radix)

returns a list of the number of integer digits for n for radix.

DigitCount(n, radix, k)

returns a the number of integer digit k in n for radix.

See

• Wikipedia - Radix

Examples

OEIS integer sequence A098949:

>> Select(Range(1000), DigitCount( # )[[1]] == 0 && DigitCount( # )[[3]] == 0 && DigitCount( # )[[5]] == 0 && DigitCount( # )[[7]] == 0 && DigitCount( # )[[9]] >0 &)

{9,29,49,69,89,90,92,94,96,98,99,209,229,249,269,289,290,292,294,296,298,299,409,
429,449,469,489,490,492,494,496,498,499,609,629,649,669,689,690,692,694,696,698,
699,809,829,849,869,889,890,892,894,896,898,899,900,902,904,906,908,909,920,922,
924,926,928,929,940,942,944,946,948,949,960,962,964,966,968,969,980,982,984,986,
988,989,990,992,994,996,998,999}

Implementation status

• ✅ - full supported

Github

• Implementation of DigitCount