Difference Between For loop and For each loop

For Loop:

It’s preferred when you know how many iteration you want. It is used to executes a block of statements for as long as a specified condition is true.

General Syntax:

for(Initialization; Test Condition; Increment)
{
       Statement;
}

Example: To add the number from 1 to 10 by using for loop and sum the number by series of 1+2+3+...+10.

using System;
using System.Collections.Generic;
using System.Text;
namespace for_loop
{
class Program
{
static void Main(string[] args)
{
  int[] arry = new int[] {1,2,3,4,5,6,7,8,9,10 };
    int s = 0;
    for (int i = 0; i < arry.Length; i++)
   {
        s = s+ arry[i];
   }
  Console.WriteLine("Sum is: {0}",s);
  Console.ReadKey();
}
}
}

Output : Sum is:55

For Each Loop:

It operates on collections of items, for instance arrays or other built-in list types. It does not use an integer index. Instead, it is used on a collection and returns each element in order. In the foreach-statement, you do not need to specify the loop bounds minimum or maximum. It traverse whole collection.

General Syntax:

foreach( Datatype item in items )
{
       Statement;
}

Example: To add the number from 1 to 10 by using foreach loop and sum the number by series of 1+2+3+...+10.

using System;
using System.Collections.Generic;
using System.Text;
namespace for_loop
{
class Program
{
static void Main(string[] args)
{
    int[] arry = new int[] {1,2,3,4,5,6,7,8,9,10 };
    int s = 0;
    foreach (int i in arry)
     {
        s = s+ i;
     }
  Console.WriteLine("Sum is: {0}",s);
  Console.ReadKey();
}
}
}

Output : Sum is:55

Conclusion:

Both the concepts are same only. For each is used for traversing items in a collection. It usually maintain no explicit counter and no use of index. They essentially say "do this to everything in this set", rather than "do this x times".

For loop is classified as an iteration statement. The statements in the for loop repeat continuously for a specific number of times. It as counter and integer index (ex: a[i], i represent the index value and change it by increment operation on each iteration).