How to display fibonacci series in java using loops
A fibonacci sequence is a series of numbers where a number is the sum of previous two numbers. Starting with 0 and 1, the sequence goes 0, 1, 1, 2, 3, 5, 8, 13, 21, and so on. Here we will write three programs to print fibonacci series in java
1) using for loop
2) using while loop
3) based on the number entered by user
Examples:
Input: N = 10
Output: 0 1 1 2 3 5 8 13 21 34
Here first term of Fibonacci is 0 and second is 1, so that 3rd term = first(o) + second(1) etc and so on.
Input: N = 15
Output: 0 1 1 2 3 5 8 13 21 34 55 89 144 233 377
Example 1:
public class JavaExample {
public static void main(String[] args) {
int count = 7, num1 = 0, num2 = 1;
System.out.print("Fibonacci Series of "+count+" numbers:");
for (int i = 1; i <= count; ++i)
{
System.out.print(num1+" ");
/* On each iteration, we are assigning second number
* to the first number and assigning the sum of last two
* numbers to the second number
*/
int sumOfPrevTwo = num1 + num2;
num1 = num2;
num2 = sumOfPrevTwo;
}
}
}
Output:
Example 2:
public class JavaExample {
public static void main(String[] args) {
int count = 7, num1 = 0, num2 = 1;
System.out.print("Fibonacci Series of "+count+" numbers:");
int i=1;
while(i<=count)
{
System.out.print(num1+" ");
int sumOfPrevTwo = num1 + num2;
num1 = num2;
num2 = sumOfPrevTwo;
i++;
}
}
}
Output:
Example 3:
This program display the sequence based on the number entered by user. For example – if user enters 10 then this program displays the series of 10 numbers.
import java.util.Scanner;
public class JavaExample {
public static void main(String[] args) {
int count, num1 = 0, num2 = 1;
System.out.println("How may numbers you want in the sequence:");
Scanner scanner = new Scanner(System.in);
count = scanner.nextInt();
scanner.close();
System.out.print("Fibonacci Series of "+count+" numbers:");
int i=1;
while(i<=count)
{
System.out.print(num1+" ");
int sumOfPrevTwo = num1 + num2;
num1 = num2;
num2 = sumOfPrevTwo;
i++;
}
}
}
Output:
How may numbers you want in the sequence: 6 Fibonacci Series of 6 numbers:0 1 1 2 3 5
How to display fibonacci series in java using loops – How to display fibonacci series in java using loops – How to display fibonacci series in java using loops
