Update and rename README.md to Fibonacci

In mathematics, the Fibonacci sequence is a sequence in which each number is the sum of the two preceding ones. Numbers that are part of the Fibonacci sequence are known as Fibonacci numbers, commonly denoted Fn. The sequence commonly starts from 0 and 1.

Author: Rahitya5

Fibonacci

@@ -0,0 +1,26 @@
+#APPROACH-1
+
+def fibonacci(n):
+    if n<=1:
+        return n
+    return fibonacci(n-1)+fibonacci(n-2)
+a=int(input())
+print(fibonacci(a))
+
+#APPROACH-2
+
+n=int(input())
+n1,n2 = 0,1
+count = 0
+if n<=0:
+    print("Enter Valid Number")
+elif n==1:
+    print(n1)
+else:
+    print("Fibonacci Series:")
+    while count<n:
+        print(n1)
+        nth = n1+n2
+        n1=n2
+        n2=nth
+        count+=1