programs on for loop

a. write a program to find squares and cubes of 1st 10 integers
b. write a program to to calculate factorial of a no,
c. write a program to print Fibonacci series
d. write a program to check whether entered no is prime or not
e. write a program to print given pattern
          *
        * * *
      * * * * *
        * * * 
          *

View Answers

March 26, 2011 at 11:17 AM

e. write a program to print given pattern * * * * * * * * * * * * *

March 26, 2011 at 1:44 PM

class SquaresAndCubes 
{
    public static void main(String[] args)
    {
        System.out.println("No    Square    Cube");

        for(int i=1;i<=10;i++){
            int sq=i*i;
            int cu=i*i*i;
            System.out.println(i+"\t "+sq+"\t "+cu);
        }
    }
}

March 26, 2011 at 1:46 PM

import java.util.*;
class  Factorial{
    public static void main(String[] args) 
    {
        Scanner input=new Scanner(System.in);
        System.out.print("Enter value of m: ");
        int m=input.nextInt();
        long num=m;
        for(int i=m;i>1;i--){
            num=num*(i-1);
        }
        System.out.println(num);
    }
}

March 26, 2011 at 1:47 PM

import java.util.*;

public class Fibonacci{
public static void main(String[] args) throws Exception {
Scanner input=new Scanner(System.in);
System.out.print("Enter value of n: ");
int sum=0;
    int num = input.nextInt();
    int f1=0,f2=0,f3=1;
    for(int i=1;i<=num;i++){
        System.out.println(f3);
        sum+=f3;
        f1=f2;
        f2=f3;
        f3=f1+f2;
    }
    System.out.println("Sum of Fibonacci Series: "+sum);
}
}

March 26, 2011 at 1:48 PM

import java.util.*;

class  CheckPrimeNumber
{
    static boolean isPrime(int number){
          boolean isPrime=false;
          int i=(int) Math.ceil(Math.sqrt(number));
          while (i>1){
             if((number!=i) && (number%i==0)){
                isPrime=false;
                break;
             }
             else if (!isPrime)
             isPrime=true;
             --i;
          }
          return isPrime;
       }
    public static void main(String[] args) 
    {
        Scanner input=new Scanner(System.in);
        System.out.println("Enter Number:");
        int num=input.nextInt();
        if(isPrime(num)){
            System.out.println("Number is Prime!");
        }
        else{
            System.out.println("Number is not prime!");
        }
    }
}

March 26, 2011 at 2:48 PM

public class PatternExample {

    public static void main(String[] args) { 
        int n = 2;

        for (int i = -n; i <= n; i++) {
            for (int j = -n; j <= n; j++) {
                if (Math.abs(i) + Math.abs(j) <= n){
                    System.out.print("* ");
                }
                else{ 
                    System.out.print("  ");
                }
            }
            System.out.println();
        }
    }
}

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