Delphi		while loop executes the code while the control condition is True: var f: TextFile; S: string; .. while not Eof(f) do begin Readln(f,S); // some processing of the S string here end; Important feature of while loop is checking the control condition before first iteration, so if the contition is False initially, the loop will never execute.
C#		The while statement executes a statement or a block of statements until a specified expression evaluates to false. int i = 1; while( i < 10 ) { // do something i++; }