printing all contents of array in C

Question

I am trying to print out the contents of an array after invoking some methods which alter it  in Java I use   System out print Arrays toString alg id      how do I do this in c

User · Answer

Another approach with the Array ForEach lt T gt  Method  T    Action lt T gt   method of the Array class  Array ForEach myArray  Console WriteLine     That takes only one iteration compared to array ToList   ForEach Console WriteLine  which takes two iterations and creates internally a second array for the List  double iteration runtime and double memory consumtion

User · Answer

this is the easiest way that you could print the String by using array     using System  using System Collections Generic  using System Linq  using System Text  using System Threading Tasks   namespace arraypracticeforstring       class Program               static void Main string   args                        string   arr   new string 3     Snehal    Janki    Thakkar                  foreach  string item in arr                                Console WriteLine item ToString                               Console ReadLine

User · Answer

If it s an array of strings you can use Aggregate  var array   new string      A    B    C    D    Console WriteLine array Aggregate  result  next    gt     result    next         A  B  C  D   that way you can reverses the order by changing the order of the parameters like so     Console WriteLine array Aggregate  result  next    gt     next    result         D  C  B  A

User · Answer

If you want to get cute  you could write an extension method that wrote an IEnumerable lt object gt  sequence to the console  This will work with enumerables of any type  because IEnumerable lt T gt  is covariant on T   using System  using System Collections Generic   namespace Demo       internal static class Program               private static void Main string   args                        string   array    new     One    Two    Three    Four                array Print                 Console WriteLine                 object   objArray   new object     One   2  3 3  TimeSpan FromDays 4    5   6 6f  7 7m               objArray Print                         public static class MyEnumerableExt               public static void Print this IEnumerable lt object gt   this                        foreach  var obj in  this                  Console WriteLine obj                        I don t think you d use this other than in test code

User · Answer

The easiest one e g  if you have a string array declared like this string   myStringArray   new string      Console WriteLine  Array       Console WriteLine    0     string Join       myStringArray

User · Answer

There are many ways to do it  the other answers are good  here s an alternative   Console WriteLine string Join   n   myArrayOfObjects

User · Answer

You can use for loop     int   random numbers    10  30  44  21  51  21  61  24  14      int array length   random numbers Length      for  int i   0  i  lt  array length  i             if i    array length - 1                 Console Write   quot  random numbers i   n quot              else                Console Write   quot  random numbers i     quot

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Starting from C  6 0  when   - string interpolation has been introduced  there is one more way   var array   new      A    B    C     Console WriteLine    string Join       array        output A  B  C   Concatenation could be archived using the System Linq  convert the string   to char   and print as a string  var array   new      A    B    C     Console WriteLine    new String array SelectMany     gt     ToArray           output ABC

User · Answer

In C  you can loop through the array printing each element   Note that System Object defines a method ToString     Any given type that derives from System Object   can override that        Returns a string that represents the current object    http   msdn microsoft com en-us library system object tostring aspx  By default the full type name of the object will be printed  though many built-in types override that default to print a more meaningful result   You can override ToString   in your own objects to provide meaningful output   foreach  var item in myArray        Console WriteLine item ToString        Assumes a console application     If you had your own class Foo  you could override ToString   like   public class Foo       public override string ToString                 return  This is a formatted specific for the class Foo

User · Answer

If you do not want to use the Array function   public class GArray       int   mainArray      int index      int i   0       public GArray                 index   0          mainArray   new int 4             public void add int addValue                 if  index    mainArray Length                        int newSize   index   2              int   temp   new int newSize               for  int i   0  i  lt  mainArray Length  i                                  temp i    mainArray i                             mainArray   temp                    mainArray index    addValue          index               public void print                 for  int i   0  i  lt  index  i                          Console WriteLine mainArray i                        class Program       static void Main string   args                GArray myArray   new GArray            myArray add 1           myArray add 2           myArray add 3           myArray add 4           myArray add 5           myArray add 6           myArray print            Console ReadKey

User · Answer

You may try this   foreach var item in yourArray        Console WriteLine item ToString         Also you may want to try something like this   yourArray ToList   ForEach i   gt  Console WriteLine i ToString        EDIT  to get output in one line  based on your comment     Console WriteLine    0     string Join       yourArray       output style    8  1  8  8  4  8  6  8  8  8    EDIT 2019   As it is mentioned in other answers it is better to use Array ForEach lt T gt  method and there is no need to do the ToList step   Array ForEach yourArray  Console WriteLine

User · Answer

I upvoted the extension method answer by Matthew Watson  but if you re migrating visiting coming from Python  you may find such a method useful   class Utils       static void dump lt T gt  IEnumerable lt T gt  list  string glue   n                 Console WriteLine string Join glue  list Select x   gt  x ToString                 -  this will print any collection using the separator provided  It s quite limited  nested collections      For a script  i e  a C  console application which only contains Program cs  and most things happen in Program Main  - this may be just fine

User · Answer

Due to having some downtime at work  I decided to test the speeds of the different methods posted here  These are the four methods I used  static void Print1 string   toPrint        foreach string s in toPrint                Console Write s            static void Print2 string   toPrint        toPrint ToList   ForEach Console Write      static void Print3 string   toPrint        Console WriteLine string Join  quot  quot   toPrint       static void Print4 string   toPrint        Array ForEach toPrint  Console Write      The results are as follows   Strings per trial  10000  Number of Trials  100  Total Time Taken to complete  00 01 20 5004836  Print1 Average  484 37ms  Print2 Average  246 29ms  Print3 Average  70 57ms  Print4 Average  233 81ms  So Print3 is the fastest  because it only has one call to the Console WriteLine which seems to be the main bottleneck for the speed of printing out an array  Print4 is slightly faster than Print2 and Print1 is the slowest of them all  I think that Print4 is probably the most versatile of the 4 I tested  even though Print3 is faster  If I made any errors  feel free to let me know   fix them on your own  EDIT  I m adding the generated IL below g  Print10 0   Print1 IL 0000   ldarg 0      IL 0001   stloc 0      IL 0002   ldc i4 0     IL 0003   stloc 1      IL 0004   br s        IL 0012 IL 0006   ldloc 0      IL 0007   ldloc 1      IL 0008   ldelem ref   IL 0009   call        System Console Write IL 000E   ldloc 1      IL 000F   ldc i4 1     IL 0010   add          IL 0011   stloc 1      IL 0012   ldloc 1      IL 0013   ldloc 0      IL 0014   ldlen        IL 0015   conv i4      IL 0016   blt s       IL 0006 IL 0018   ret           g  Print20 1   Print2 IL 0000   ldarg 0      IL 0001   call        System Linq Enumerable ToList lt String gt  IL 0006   ldnull       IL 0007   ldftn       System Console Write IL 000D   newobj      System Action lt System String gt   ctor IL 0012   callvirt    System Collections Generic List lt System String gt  ForEach IL 0017   ret           g  Print30 2   Print3 IL 0000   ldstr        quot  quot  IL 0005   ldarg 0      IL 0006   call        System String Join IL 000B   call        System Console WriteLine IL 0010   ret           g  Print40 3   Print4 IL 0000   ldarg 0      IL 0001   ldnull       IL 0002   ldftn       System Console Write IL 0008   newobj      System Action lt System String gt   ctor IL 000D   call        System Array ForEach lt String gt  IL 0012   ret

[c#] printing all contents of array in C#

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