Program Recipes


Fibonacci Series


Introduction: What is an Fibonacci Series?

A series of numbers in which each number is the sum of the two preceding or previous numbers is called Fibonacci Series.

Parameters Needed

  1. a
  2. b
  3. c
  4. n
  5. i

Algorithm

                Step 1: Start 
                Step 2: Declare variable a, b, c, n, i
                Step 3: Initialize variable a=0, b=1 and  i=2 
                Step 4: Read n from user 
                Step 5: Print a and b 
                Step 6: Repeat until i<=n : 
                        Step 6.1: c=a+b 
                        Step 6.2: print c 
                        Step 6.3: a=b, b=c 
                        Step 6.4: i=i+1 
                Step 7: Stop
            

Code


                const number = parseInt(prompt('Enter the number of terms: '));
                let n1 = 0, n2 = 1, nextTerm;

                console.log('Fibonacci Series:');

                for (let i = 1; i <= number; i++) {
                    console.log(n1);
                    nextTerm = n1 + n2;
                    n1 = n2;
                    n2 = nextTerm;
                }
            

Output

fibonacci_series