Fibonacci Series Java and Declare multiple variables in for loop and Generate Pyramid

Declare multiple variables in for loop

public class DeclaringMultipleVariablesInForLoopExample

{

public static void main(String[] args)

{

for(int i=0, j=1, k=2 ; i<5 i="" span="">

System.out.println("I : " + i + ",j : "+ j + ", k : " + k);

for(int i=0, float j; i < 5; i++);

  }

}

Fibonacci Series Java

public class JavaFibonacciSeriesExample

{

public static void main(String[] args)

{             

int limit = 20;     

long[] series = new long[limit];

series[0] = 0;

series[1] = 1;

for(int i=2; i < limit; i++)

{

series[i] = series[i-1] + series[i-2];

}

System.out.println("Fibonacci Series upto " + limit);

for(int i=0; i< limit; i++){

System.out.print(series[i] + " ");

     }

   }

}

Generate Pyramid For a Given Number

import java.io.BufferedReader;

import java.io.InputStreamReader;

public class GeneratePyramidExample

 {

public static void main (String[] args) throws Exception

{              

BufferedReader keyboard = new BufferedReader (new InputStreamReader (System.in));             

System.out.println("Enter Number:");

int as= Integer.parseInt (keyboard.readLine());

System.out.println("Enter X:");

                     int x=   Integer.parseInt (keyboard.readLine());

int y = 0;           

for(int i=0; i<= as ;i++)

{         

for(int j=1; j <= i ; j++)

{

System.out.print(y + "\t");

y = y + x;

}                       

System.out.println("");

    }

  }

}