You will display "every other" number until 20.
You can augment the number variable by 2 in for loop, the corresponding statement will be number += 2.
using System; class Program// w w w . j a va2s. c o m { static void Main(string[] args) { // Output for (int number = 2; number <= 20; number += 2) { Console.WriteLine(number); } } }
You can have an ordinary loop from 1 to 10 stepping by 1 and display twice the amount of its control variable rather than the variable itself.
using System; class Program//from ww w. j av a 2 s . com { static void Main(string[] args) { // Output for (int line = 1; line <= 10; line++) { int displayedNumber = 2 * line; Console.WriteLine(displayedNumber); } } }