Nice the '_'

nicely done

Better if the table name was different than the column name

Thanks . really good

Numbers with a leading zero are (in some programming languages) interpreted as octal (base 8). 17 in the octal number system is 15 in the decimal numer system (base 10). squareDitigts(15) gives 125, since 1² = 1, and 5² = 25.

You can use the hexadecimal system by prefixing the number with 0x, and binary with 0b. At least in JavaScript.
017 = 0xf = 0b1111 = 15.

ok , I'm just starting go and using codewars

Please mark you post as having spoiler content next time. That's not how switch works.

Test passed . however give strange result when number start with 0 ( 017 gives 125) or (012 gives 10)