C# 0 The Complete Reference

PART I

C h a p t e r   5 :  

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105

PART IPART I

// Use continue.

using System;

class ContDemo {

  static void Main() {

    // Print even numbers between 0 and 100.

    for(int i = 0; i <= 100; i++) {

      if((i%2) != 0) continue; // iterate

      Console.WriteLine(i);

    }

  }

}

Only even numbers are printed, because an odd number will cause the loop to iterate early, 

bypassing the call to 

WriteLine( )

.

In

while

 and 

do-while

 loops, a 

continue

 statement will cause control to go directly to 

the conditional expression and then continue the looping process. In the case of the 

for

, the 

iteration expression of the loop is evaluated, then the conditional expression is executed, 

and then the loop continues.

Good uses of 

continue

 are rare. One reason is that C# provides a rich set of loop statements 

that fit most applications. However, for those special circumstances in which early iteration 

is needed, the 

continue

 statement provides a structured way to accomplish it.