Question

Q1:Write a Java program to find Fibonacci Series using 1) using for loop 2) using while loop To Understand what the Fibonacci series is: The Fibonacci sequence is a series of numbers where a number is the sum of the previous two numbers. Starting with 0 and 1, the sequence goes 0, 1, 1, 2, 3, 5, 8, 13, 21, and so on.

Q2: Write a Java program to find the Factorial of a number using a while loop. To Understand what the Factorial of a Number is: Factorial of a number n is denoted as n! and the value of n! is: 1 * 2 * 3 * … (n-1) * n

Answer 1

Solution:

Q1)

Code:

Copyable Code:

//Import package

import java.util.Scanner;

//Main class

class Main {

//Main method

public static void main(String[] args) {

      //Declaration of variables

      int number,temp1=0,temp2=1;

      //Prompt and get from user

      System.out.println("Enter the number:");

      Scanner s=new Scanner(System.in);

      number=s.nextInt();

      //1

System.out.print("1.Fibonacci Series using For loop is:");

      //Using For loop

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

      {

          //output

          System.out.print(temp1 + " , ");

          //Calculation part

          int tot = temp1 + temp2;

          temp1 = temp2;

          temp2 = tot;

      }

      //2

System.out.print("\n2.Fibonacci Series using While loop is:");

      //Inititalization of variables

      int i=1;

      temp1=0;

      temp2=1;

      //Using while loop

      while (i <= number)

      {

            //Output

            System.out.print(temp1 + " , ");

            //Calculation part

            int tot = temp1 + temp2;

            temp1 = temp2;

            temp2 = tot;

            i++;

      }

}

}

Q2)

Code:

Output:

Copyable code:

//Import package

import java.util.Scanner;

//Main class

class Main {

//Main method

public static void main(String[] args) {

//Declaration of variables

int number,i=1;

long res=1;

//Prompt and get from user

System.out.println("Enter the number:");

Scanner s=new Scanner(System.in);

number=s.nextInt();

//Factorial of the number is

while(i<=number)

{

//Calculation

res = res * i;

i++;

}

//Print the result

System.out.println("Factorial of given number "+number+" is: "+res);

}

}