C # Differences between while and for loop statements

C # Differences between while and for loop statements

The while statement executes a statement or block until the specified expression is calculated as false.

// Statements_while.cs
Using system;
Class whiletest
{
Static void main ()
    {
Int n = 1;
While (n <6)
        {
Console. writeline ("current value of n is {0}", n );
N ++;
        }
    }
}

The test of the while expression occurs before each loop, so the while loop is executed zero or more times. This is different from executing a do loop once or multiple times.

When a break, goto, return, or throw statement transfers control beyond a while loop, the loop can be terminated. To pass control to the next iteration without exiting the loop, use the continue statement. Note that in the preceding three examples, the output varies depending on the position where int n increments. In the following example, no output is generated.

// Statements_while_3.cs
// No output is generated
Using system;
Class whiletest
{
Static void main ()
    {
Int n = 5;
While (++ n <6)
        {
Console. writeline ("current value of n is {0}", n );
        }
  

C # for statement

C # for statements are the most common loop structure in most languages, but the syntax is not the same, but the usage is the same.

Code: for (initial value; test; increment/decrement value) {one or more statements;} c # statements followed by the for loop. If you want for to control multiple statements, use the code block symbol to enclose these statements.

Only the even number is displayed during the loop !!!

Void button2_click (object sender, eventargs e)
{
For (int I = 1; I <26; I + = 2)
{
Label2.text + = I + ","; // do not use tostring () because it is followed by string
}
}

Or easy to understand
Protected void button2_click (object sender, eventargs e)
{
For (int I = 1; I <26; I ++)
{
If (I % 2 = 0) // if the remainder of Division 2 is 0
{
Label2.text + = I + ",";
}

}
}