From ea9b6a906a0d56d71777a1eb2e1d9132ee075f3b Mon Sep 17 00:00:00 2001
From: DhanrajDesai <48202923+DhanrajDesai@users.noreply.github.com>
Date: Fri, 2 Oct 2020 22:29:20 +0530
Subject: [PATCH]  Fibonacci number

How to check if a given number is Fibonacci number
---
 Fibonacci number | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 Fibonacci number

diff --git a/Fibonacci number b/Fibonacci number
new file mode 100644
index 0000000..5db83fe
--- /dev/null
+++ b/Fibonacci number	
@@ -0,0 +1,17 @@
+
+import math 
+def isPerfectSquare(x): 
+	s = int(math.sqrt(x)) 
+	return s*s == x 
+
+
+def isFibonacci(n): 
+
+	return isPerfectSquare(5*n*n + 4) or isPerfectSquare(5*n*n - 4) 
+	
+
+for i in range(1,11): 
+	if (isFibonacci(i) == True): 
+		print i,"is a Fibonacci Number"
+	else: 
+		print i,"is a not Fibonacci Number "