Letter_combination_of_a_phone_number.java

[Raghavarora27]

Issue Id you have worked upon -

Issue #329

Briefly explain your program logic -

 ""                   [ "" ]   
  |                    
 3 , 3                [d,e,f]
  |
23 , 2               a[d,e,f] + b[d,e,f] + c[d,e,f] -- > [ad,ae,af,bd,be,bf,cd,ce,cf]

Here, "23" is the input string , we will take out 2 and pass the remaining string i,e "3", then we will take out 3 and pass remaining string i,e, "" . (Then this will hit the base case and will return the ArrayList containing empty string) ( As Shown Above) Now, it will make combinations of characters of 3 with returned Arraylist and so no. (As done in code).

Screenshots(Attach 2 screenshots of your own input and output) -

Attach here

Checklist:

All the conditions should be fulfilled for considering your code for merging -

• [x] I have mentioned the question as comment in my solution file.
  

• [x] My code follows the guidelines of this project.
  

• [x] I have performed a self-review of my own code.
  

• [x] I have commented my code.
  

• [x] My code gives the correct output.
  

• [x] I confirm that I have not copied the code from anywhere. In case its found that I have copied even after successful merge then I can be banned from the repository and hacktoberfest.
  

• [x] I affirm that I strictly follow contributing guidelines and code of conduct.

[Raghavarora27]

I have to add the explanation in the code as well ??

[Raghavarora27]

Now, Is it fine ?