The for statement ( For...Next in VB ) executes embedded statements a specified number of times.

for ( counter; condition; increment ) {
   ... statements ...
}

Dim counter as Integer
For counter = start To end [ Step step ] 
   ... statements ...
Next

for ( counter; condition; increment ) {
   ... statements ...
}

• In C# and JScript, the for statement specifies a counter variable, a test condition, and an action that updates the counter.
• The condition can be any valid expression that evaluates to true or false.
• In VB, the for...next statement specifies a lower bound, an upper bound, and an optional step value. The counter variable must be initialized before the loop.

NOTE: The variable of a for statement must be of a type that supports the greater than ( > ), less than ( < ), and addition ( + ) operators; otherwise, a compile-time error occurs.

A for statement is executed as follows:

• The counter variable is initialized once ( ex. int i=1; ).
• The condition ( ex. i < 7; ) is evaluated.
• If the condition is true, the embedded statements are executed, and the counter variable is updated using the increment expression ( ex. i ++ ).
• Thereafter, control is passed back to the beginning of the for statement, and the processs is repeated as long as the condition is true.
• When the condition returns false, the loop ends and control is passed to the statement after the for block.

The below example demonstrates use of a for loop to repeatedly render an HTML block, increasing the font size with each pass thru the loop.

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Below are links to further code examples that illustrate using the for loop in ASP.NET web forms.

DataGrid CellPadding Property Example Run Sample | View Source

Generating Table Rows and Cells Dynamically Run Sample | View Source

WebControl BorderWidth Property Example Run Sample | View Source