Fibonacci series

Fibonacci

# Easy fibonacci exercise
# Method #1
def fibonacci(n):
    # 1th: 0
    # 2th: 1
    # 3th: 1 ...
    if n == 1:
        return 0
    elif n == 2:
        return 1
    else:
        return fibonacci(n - 1) + fibonacci(n - 2)

# Method #2
def fibonacci2(n):
    if n == 0: return 0
    n1 = 1
    n2 = 1
    # (1, n - 2) because start by 1, 2, 3... not 0, 1, 1, 2, 3....
    for i in range(1, n - 2):
        n1 += n2
        n2 = n1 - n2
    return n1


print(fibonacci(13))
# return the nth element in the fibonacci sequence

Fibonacci series

// Fibonacci Series
0,1,1,2,3,5,8,13,21,34,55,89,144......

Fibonacci series

#fibonacci series is special type of sequence
#fibonacci series is somethinng liket this-->
#0,1,1,2,3,5,8,13,21,34,55,89.......
#addition of former two succesive number results in the third element.
#in simple way as given in above series that 0,1,1--> where 0+1=1 e,i; 1
#example: 2,3,5 addition of 2 and 3 results in latter element in sequence e,i 5
8,13,21 :  8 + 13=21
34,55,89:  34 + 55=89

Fibonacci series

#program to find the fibonacci series
n=int(input('Enter the number of terms in the Fibonacci series :'))
f,s=0,1
print('Fibonacci series =',f,s,sep=',',end=',')
for i in range(3,n+1):
 nxt=f+s
 print(nxt,end=',')
 f,s=s,nxt
#output
Enter the number of terms in the Fibonacci series :7
Fibonacci series =,0,1,1,2,3,5,8,
________________________________________________________________________________
Enter the number of terms in the Fibonacci series :10
Fibonacci series =,0,1,1,2,3,5,8,13,21,34,
________________________________________________________________________________
Enter the number of terms in the Fibonacci series :4
Fibonacci series =,0,1,1,2,

Fibonacci series

// FIBONACCI SERIES
// 0 1 1 2 3 5 8 13 

let number = 7;
// let a=0,b =1,next;
let a=-1,b=1,next;

for(let i=1;i<=number;i++){
  next= a + b;
  a = b;
  b = next
  console.log(next)
}

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