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listnumberstype-conversiondigitsj

Multiply digits of a number in J

I'm trying to multiply the digits of a number in J.

My idea is to convert a number to a list of his digit, and then multiply them.

ps: I am searching for an implicit function.

Update: I found a possible solution, it was easiest that I thought.

Solution

  • I found the answer in another my question: List a number's digits in J

    So, I just need to do:

    intToList =: (".@;"0@":)
*/(5{.(intToList 123456789))