Check out example codes for "for in c#". It will help you in understanding the concepts better.

Code Example 1

for (int i = 0; i < 5; i++)
{
    Console.WriteLine(i);
}

Code Example 2

/* 	for( declartion ; question ; operation )
	the semi-colon(;) is a must but the declation, question and opertion is not
 	the declation question and operation can be swaped to your liking 
	and even removed completly */
// examples: 
for(int i = 0; i < 3; i++)  // output:
{							//	Hi
  Console.WriteLine("Hi");	//	Hi
}							//	Hi
for(int i = 0; i < 3; i++)  // output:
{							//	0
  Console.WriteLine(i);		//	1
}							//	2
// pay attention to this question it's <= instead of <
for(int i = 5; i <= 8; i++)  // output:
{							//	5
  Console.WriteLine(i);		//	6
}							//	7
							// 	8
for(int i = 3; i > 0; i--)  // output:
{							//	3
  Console.WriteLine(i);		//	2
}							//	1
for(;;) // this will result in an infinite loop
{
 	// code here
}

Code Example 3

for (int i = 0; i < 10; i++)
{
    Console.WriteLine("Value of i: {0}", i);
}

Code Example 4

for (initializer; condition; iterator)
    body

//Example : 

for (int i = 0; i < 5; i++)
{
    Console.WriteLine(i);
}

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