Smart keypad 1 (code creation doubt)

#1

sir i tried for more than 1 hour on this qustion , i have understood the way it has to be solved but not able to implement it i the code form , if you could provide me any referal code it would be help

#2

the idea of this ques is same as that of keypad comination…
1)take a string as input
say the string you are taking input as 234

break the string as 2 + 34…call recursion on 34…recursion will do the work on 34 and return you an arraylist of strngs(make your return type of function as ArrayList)…
3)Now just do your self work that is for every character of 2(abc) append it with each String which came as recursion result(from 34’s recursive call)

return the new ArrayList

#3

234 means
2-abc
3-def
4-ghi

in output we will get (34’s recursive call)
dg
dh
di
eg
eh
ei
fg
fh
fi

now append them with a,b and c respectively
to get the desired output
adg,adh…etc

#4

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