How to split a number into individual digits in c

Question

Say I have 12345   I d like individual items for each number  A String would do or even an individual number   Does the  Split method have an overload for this

User · Answer

I d use modulus and a loop   int   GetIntArray int num        List lt int gt  listOfInts   new List lt int gt         while num  gt  0                listOfInts Add num   10           num   num   10            listOfInts Reverse        return listOfInts ToArray

User · Answer

Substring and Join methods are usable for this statement   string no    12345   string    numberArray   new string no Length   int counter   0      for  int i   0  i  lt  no Length  i              numberArray i    no Substring counter  1      1 is split length      counter          Console WriteLine string Join      numberArray      output  gt  gt  gt  0 1 2 3 4 5

User · Answer

You can simply do    123456  Select q   gt  new string q 1   ToArray      to have an enumerable of integers  as per comment request  you can    123456  Select q   gt  int Parse new string q 1    ToArray      It is a little weak since it assumes the string actually contains numbers

User · Answer

Well  a string is an IEnumerable and also implements an indexer  so you can iterate through it or reference each character in the string by index   The fastest way to get what you want is probably the ToCharArray   method of a String   var myString    12345    var charArray   myString ToCharArray        1   2   3   4   5     You can then convert each Char to a string  or parse them into bytes or integers  Here s a Linq-y way to do that   byte   byteArray   myString ToCharArray   Select c  gt byte Parse c ToString     ToArray      A little more performant if you re using ASCII Unicode strings   byte   byteArray   myString ToCharArray   Select c  gt  byte c - 30  ToArray      That code will only work if you re SURE that each element is a number  otherisw the parsing will throw an exception  A simple Regex that will verify this is true is    d     matches a full string consisting of one or more digit characters   used in the Regex IsMatch   static method

User · Answer

Something like this will work  using Linq   string result    12345  var intList   result Select digit   gt  int Parse digit ToString        This will give you an IEnumerable list of ints   If you want an IEnumerable of strings   var intList   result Select digit   gt  digit ToString       or if you want a List of strings   var intList   result ToList

User · Answer

Here is some code that might help you out   Strings can be treated as an array of characters  string numbers    12345   int   intArray   new int numbers Length   for  int i 0  i  lt  numbers Length  i         intArray i    int Parse numbers i

[c#] How to split a number into individual digits in c#?

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