Fibonacci sequence calculator added to the beginner level programs.

Beginner_Level_Python_programs/fibonacci_sequence.py

@@ -0,0 +1,33 @@
+#Fibonacci sequence starts with 0 and 1 as the first numbers and the consequetive numbers are calculated by adding up the two numbers before them
+#0, 1, 1, 2, 3, 5, 8, 13 ...
+
+# Function to claculate list of fibonacci numbers
+def fibonacci_calc(num):
+    result = list()
+    count = 0 
+    # Invalid input
+    if num <= 0:
+        print("Please enter a positive integer (input>0)")
+        return result
+    # Input 1
+    elif num == 1:
+        result.append(0)
+        return result
+    else:
+        #starting values
+        n1, n2 = 0, 1
+        while count < num:
+            result.append(n1)
+            nth = n1 + n2
+            n1 = n2
+            n2 = nth
+            count += 1
+    return result
+
+
+if __name__ == "__main__":
+    fibo_list = list()
+    n = int(input("Please enter the sequence number: "))
+    fibo_list = fibonacci_calc(n)
+    for i in fibo_list:
+        print(i)