C# 0 The Complete Reference

Some Variations on the for Loop

The

for

is one of the most versatile statements in the C# language because it allows a wide 

range of variations. They are examined here.

Using Multiple Loop Control Variables

The

for

 loop allows you to use two or more variables to control the loop. When using 

multiple loop control variables, the initialization and increments statements for each 

variable are separated by commas. Here is an example:

// Use commas in a for statement.

using System;

class Comma {

  static void Main() {

    int i, j;

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    for(i=0, j=10; i < j; i++, j--)

      Console.WriteLine("i and j: " + i + " " + j);

  }

}

The output from the program is shown here:

i and j: 0 10

i and j: 1 9

i and j: 2 8

i and j: 3 7

i and j: 4 6

Here, commas separate the two initialization statements and the two iteration expressions. 

When the loop begins, both