22a. Sum Digits
Sum the digits in a number.
sum-digits: whole-number -> number
Find the sum of the digits in a number.
| n | (sum-digits n) |
simplified |
|---|---|---|
| 5 | 5 | 5 |
| 53 | 5 + 3 | 8 |
| 921 | 9 + 2 + 1 | 12 |
| 3216 | 3 + 2 + 1 + 6 | 12 |
| 65536 | 6 + 5 + 5 + 3 + 6 | 25 |
sum-digits: whole-number -> number
Find the sum of the digits in a number.
| n | (sum-digits n) |
simplified |
|---|---|---|
| 5 | 5 | 5 |
| 53 | 5 + 3 | 8 |
| 921 | 9 + 2 + 1 | 12 |
| 3216 | 3 + 2 + 1 + 6 | 12 |
| 65536 | 6 + 5 + 5 + 3 + 6 | 25 |