What is the Fibonacci series? in java | Displaying the Fibonacci sequence using a loop

In this program, we will learn what is Fibonacci series and their example using for loop and while loop.

In the Fibonacci series, the next number is the sum of the previous two numbers. The first two numbers in the Fibonacci series are 0 and 1.

Way-1: Java Program to Display Fibonacci Series using while loop

import java.io. *;
import java.util. *;
public class Fabonacci {

static public void main(String[]sss)
 {
int n = 10, a = 0, b = 1;

while (a <= n)
    {
        System.out.print(a + " ");
    int
    sum = a + b;
    a = b;
    b = sum;

    }
   }
 }

Output:

PS C:\Users\Pramod\Desktop\MPS>  c:; cd 'c:\Users\Pramod\Desktop\MPS'; & 'c:\Users\Pramod\.vscode\extensions\vscjava.vscode-java-debug-0.31.0\scripts\launcher.bat' 'C:\Program Files\Java\jdk-15.0.2\bin\java.exe' '--enable-preview' '-XX:+ShowCodeDetailsInExceptionMessages' '-Dfile.encoding=UTF-8' '-cp' 'C:\Users\Pramod\AppData\Roaming\Code\User\workspaceStorage\68adb333e7c4b36a52ea53bc8c24e1ec\redhat.java\jdt_ws\MPS_776f50d0\bin' 'Fabonacci'

0 1 1 2 3 5 8

PS C:\Users\Pramod\Desktop\MPS>

Way-2: Java Program to Display Fibonacci Series using while loop

Public class JavaExample {

public static void main (String [] args) {

int count = 7, num1 = 0, num2 = 1;
System.out.print ("" + count + "Fibonacci series of numbers:");

int i = 1;
While (i <= count)
{
System.out.print (num1 + "");
int sumOfPrevTwo = num1 + num2;
num1 = num2;
num2 = sumOfPrevTwo;
i ++;
}
}
}

Output:

PS C:\Users\Pramod\Desktop\MPS>  c:; cd 'c:\Users\Pramod\Desktop\MPS'; & 'c:\Users\Pramod\.vscode\extensions\vscjava.vscode-java-debug-0.31.0\scripts\launcher.bat' 'C:\Program Files\Java\jdk-15.0.2\bin\java.exe' '--enable-preview' '-XX:+ShowCodeDetailsInExceptionMessages' '-Dfile.encoding=UTF-8' '-cp' 'C:\Users\Pramod\AppData\Roaming\Code\User\workspaceStorage\68adb333e7c4b36a52ea53bc8c24e1ec\redhat.java\jdt_ws\MPS_776f50d0\bin' 'Fabonacci'

Fibonacci series of 7 numbers: 0 1 1 2 3 5 8

PS C:\Users\Pramod\Desktop\MPS>

Java Program to Display Fibonacci Series using for loop

Public class JavaExample {

public static void main (String [] args) {

int count = 7, num1 = 0, num2 = 1;
System.out.print ("" + count + "Fibonacci series of numbers:");

for (int i = 1; i <= count; ++ i)
{
System.out.print (num1 + "");

/ * At each iteration, we are assigning another number
* To specify the sum of the first number and the last two
* Number on the second number
* /
int sumOfPrevTwo = num1 + num2;
num1 = num2;
num2 = sumOfPrevTwo;
}
}
}

Output:

PS C:\Users\Pramod\Desktop\MPS>  c:; cd 'c:\Users\Pramod\Desktop\MPS'; & 'c:\Users\Pramod\.vscode\extensions\vscjava.vscode-java-debug-0.31.0\scripts\launcher.bat' 'C:\Program Files\Java\jdk-15.0.2\bin\java.exe' '--enable-preview' '-XX:+ShowCodeDetailsInExceptionMessages' '-Dfile.encoding=UTF-8' '-cp' 'C:\Users\Pramod\AppData\Roaming\Code\User\workspaceStorage\68adb333e7c4b36a52ea53bc8c24e1ec\redhat.java\jdt_ws\MPS_776f50d0\bin' 'Fabonacci'

fibonacci series of 7 number: 0 1 1 2 3 5 8

PS C:\Users\Pramod\Desktop\MPS>

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