write a code that sum the digts of an integer

Question

Example 1:
Input=25
Output=7
Example 2:
Input=99
Output=18

Answer 1

https://code.sololearn.com/cDMf4B3y6LPY/?ref=app

Answer 2

Here
https://code.sololearn.com/cSfCk3Y3Ye33/?ref=app

Answer 3

https://code.sololearn.com/c62Gr816cGci/?ref=app
Sum of digits - java program

Answer 4

https://code.sololearn.com/ckwy9htM2682/?ref=app