(Answered): In Scala 3. Complete the definition of the following function: def singleDigit(num: Int): Int = This ...

3. Complete the definition of the following function: def singleDigit(num: Int): Int = This function takes a positive integer, num, as input and returns a digit between 0 and 9 as the output. The output is computed as follows:sum all the digits in num to obtain a result; if this resultis less than 10 then result is the answer; otherwise take the resultand apply the same procedure (i.e. sumits digits and compute a result, ...). Forexample, singlebigit 437425) => (3+7+4+2+5) = 21 => (2+1) = 3 singleRigit49876543) => (9+8+7+6+5+4+3) = 42 => (4+2) = 6