Determine if a number is prime. If it is not, then display its largest factor : for « Language Basics « C# / C Sharp

Home
C# / C Sharp
1.2D Graphics
2.Class Interface
3.Collections Data Structure
4.Components
5.Data Types
6.Database ADO.net
7.Design Patterns
8.Development Class
9.Event
10.File Stream
11.Generics
12.GUI Windows Form
13.Language Basics
14.LINQ
15.Network
16.Office
17.Reflection
18.Regular Expressions
19.Security
20.Services Event
21.Thread
22.Web Services
23.Windows
24.Windows Presentation Foundation
25.XML
26.XML LINQ
C# / C Sharp by API
C# / CSharp Tutorial
C# / CSharp Open Source
C# / C Sharp » Language Basics » forScreenshots 
Determine if a number is prime. If it is not, then display its largest factor
Determine if a number is prime.  If it is not,     then display its largest factor

/*
C#: The Complete Reference 
by Herbert Schildt 

Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
/* 
   Determine if a number is prime.  If it is not, 
   then display its largest factor. 
*/ 
 
using System; 
 
public class FindPrimes {    
  public static void Main() {    
    int num; 
    int i; 
    int factor; 
    bool isprime; 
 
 
    for(num = 2; num < 20; num++) { 
      isprime = true;  
      factor = 0
 
      // see if num is evenly divisible 
      for(i=2; i <= num/2; i++) { 
        if((num % i== 0) { 
          // num is evenly divisible -- not prime 
          isprime = false
          factor = i; 
        
      
 
      if(isprime
        Console.WriteLine(num + " is prime.")
      else 
        Console.WriteLine("Largest factor of " + num + 
                          " is " + factor)
    
  }    
}

           
       
Related examples in the same category
1.Simplest forSimplest for
2.For loop for array
3.The finished C# statement Help system that processes multiple requestsThe finished C# statement Help system       that processes multiple requests
4.Determine smallest single-digit factorDetermine smallest single-digit factor
5.A negatively running for loopA negatively running for loop
6.loop with letter char as the control variable
7.Use commas in a for statememtUse commas in a for statememt
8.Use commas in a for statememt to find the largest and smallest factor of a numberUse commas in a for statememt to find     the largest and smallest factor of a number
9.Loop condition can be any bool expression
10.Parts of the for can be emptyParts of the for can be empty
11.Move more out of the for loopMove more out of the for loop
12.The body of a loop can be emptyThe body of a loop can be empty
13.Declare loop control variable inside the forDeclare loop control variable inside the for
14.Using break to exit a loopUsing break to exit a loop
15.Use continueUse continue
16.Demonstrate the for loopDemonstrate the for loop
17.Compute the sum and product of the numbers from 1 to 10. Compute the sum and product of the numbers from 1 to 10.
18.For Loop TesterFor Loop Tester
19.If inside a forIf inside a for
20.For without init valueFor without init value
21.For without increaseFor without increase
22.For with empty conditionFor with empty condition
23.a for loop to display 1 to 5a for loop to display 1 to 5
24.Update two parameters in for loop
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.