🏆 ยอดนิยม: web//https://www.geeksforgeeks.org/print fibonacci sequence using variables

Print the Fibonacci sequence. The first Fibonacci numbers are:

C++

// Simple CPP Program to print Fibonacci  
// sequence 
#include <iostream> 
using std::cout; 
void fib(int n) 
{ 
    int a = 0, b = 1, c; 
    if (n >= 0) 
        cout << a << " "; 
    if (n >= 1) 
        cout << b << " "; 
    for (int i = 2; i <= n; i++) { 
        c = a + b; 
        cout << c << " "; 
        a = b; 
        b = c; 
    } 
} 
  
// Driver code 
int main() 
{ 
    fib(9); 
    return 0; 
} 

Java

// Simple Java Program to print 
// Fibonacci  sequence 
import java.io.*; 
class GFG { 
  
static void fib(int n) 
{ 
    int a = 0, b = 1, c; 
    if (n >= 0) 
        System.out.print( a + " "); 
    if (n >= 1) 
        System.out.print( b + " "); 
    for (int i = 2; i <= n; i++)  
    { 
        c = a + b; 
        System.out.print( c + " "); 
        a = b; 
        b = c; 
    } 
} 
  
    // Driver code 
    public static void main (String[] args)  
    { 
            fib(9); 
    } 
} 
  
// This code is contributed by anuj_67. 

Python3

# Simple Python3 Program to  
# print Fibonacci sequence 
  
def fib(n): 
    a = 0
    b = 1
    if (n >= 0): 
        print(a, end=' ') 
    if (n >= 1): 
        print(b, end=' ') 
    for i in range(2, n+1): 
        c = a + b 
        print(c, end=' ') 
        a = b 
        b = c 
  
# Driver code 
fib(9) 
  
# This code is contributed  
# by Prasad Kshirsagar 

C#

// Simple C# Program to print 
// Fibonacci sequence 
using System; 
class GFG  
{ 
static void fib(int n) 
{ 
    int a = 0, b = 1, c; 
    if (n >= 0) 
        Console.Write( a + " "); 
    if (n >= 1) 
        Console.Write( b + " "); 
    for (int i = 2; i <= n; i++)  
    { 
        c = a + b; 
        Console.Write( c + " "); 
        a = b; 
        b = c; 
    } 
} 
  
// Driver code 
public static void Main ()  
{ 
        fib(9); 
} 
} 
  
// This code is contributed by anuj_67. 

PHP

<?php 
// Simple php Program to print 
// Fibonacci sequence 
  
function fib( $n) 
{ 
    $a = 0; $b = 1; $c; 
    if ($n >= 0) 
        echo $a , " "; 
    if ($n >= 1) 
        echo $b , " "; 
    for ( $i = 2; $i <= $n; $i++)  
    { 
        $c = $a + $b; 
        echo $c , " "; 
        $a = $b; 
        $b = $c; 
    } 
} 
  
// Driver code 
fib(9); 
  
// This code is contributed by anuj_67. 
?> 

Output:

0 1 1 2 3 5 8 13 21 34

How to print using 2 variables isntead of 3 variables?

The algorithm with 2 variables is:
1. print a+b.
2. add a to b.
3. assign b – a to a.

C++

// CPP Program to print Fibonacci sequence 
// using 2 variables 
#include <iostream> 
using std::cout; 
void fib(int n) 
{ 
    int a = 0, b = 1; 
    if (n >= 0) 
        cout << a << " "; 
    if (n >= 1) 
        cout << b << " "; 
    for (int i = 2; i <= n; i++) { 
        cout << a + b << " "; 
        b = a + b; 
        a = b - a; 
    } 
} 
  
// Driver code 
int main() 
{ 
    fib(9); 
    return 0; 
} 

Java

// Java Program to print  
// Fibonacci sequence 
// using 2 variables 
import java.io.*; 
class GFG { 
      
static void fib(int n) 
{ 
    int a = 0, b = 1; 
    if (n >= 0) 
        System.out.print(a + " "); 
    if (n >= 1) 
        System.out.print(b + " "); 
    for (int i = 2; i <= n; i++)  
    { 
        System.out.print(a + b + " "); 
        b = a + b; 
        a = b - a; 
    } 
} 
  
    // Driver code 
    public static void main (String[] args)  
    { 
        fib(9); 
    } 
} 
  
// This code is contributed by anuj_67. 

Python3

# Simple Python3 Program to 
# print Fibonacci sequence 
# using 2 variables 
  
def fib(n): 
    a = 0
    b = 1
    if (n >= 0): 
        print(a, end=' ') 
    if (n >= 1): 
        print(b, end=' ') 
    for i in range(2, n+1): 
        print(a + b, end=' ') 
        b = a + b 
        a = b - a 
  
# Driver code 
fib(9) 
  
# This code is contributed by 
# Prasad Kshirsagar 

C#

// C# Program to print Fibonacci 
// sequence using 2 variables 
using System; 
  
class GFG { 
          
    static void fib(int n) 
    { 
        int a = 0, b = 1; 
          
        if (n >= 0) 
            Console.Write(a + " "); 
        if (n >= 1) 
            Console.Write(b + " "); 
        for (int i = 2; i <= n; i++)  
        { 
            Console.Write(a + b + " "); 
            b = a + b; 
            a = b - a; 
        } 
    } 
  
    // Driver code 
    public static void Main ()  
    { 
        fib(9); 
    } 
} 
  
// This code is contributed by anuj_67. 

PHP

<?php 
// PHP Program to print Fibonacci sequence 
// using 2 variables 
  
function fib( $n) 
{ 
    $a = 0; $b = 1; 
    if ($n >= 0) 
        echo $a , " "; 
    if ($n >= 1) 
        echo $b , " "; 
    for ($i = 2; $i <= $n; $i++) 
    { 
        echo $a + $b , " "; 
        $b = $a + $b; 
        $a = $b - $a; 
    } 
} 
  
    // Driver code 
    fib(9); 
      
// This code is contributed by anuj_67 
?> 

Output :

0 1 1 2 3 5 8 13 21 34

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Print Fibonacci sequence using 2 variables

C++

Java

Python3

C#

PHP

C++

Java

Python3

C#

PHP

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