Create primenumber.py

fibonacci.py

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+# Taking 1st two fibonacci numbers as 0 and 1
+
+def fibonacci(n):
+    a = 0
+    b = 1
+    if n < 0:
+        print("Incorrect input")
+    elif n == 0:
+        return a
+    elif n == 1:
+        return b
+    else:
+        for i in range(2, n):
+            c = a + b
+            a = b
+            b = c
+        return b
+
+# Driver Program
+
+print(fibonacci(9))

primenumber.py

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+# Program to check if a number is prime or not
+
+
+# To take input from the user
+#num = int(input("Enter a number: "))
+
+# define a flag variable
+flag = False
+
+# prime numbers are greater than 1
+if num > 1:
+    # check for factors
+    for i in range(2, num):
+        if (num % i) == 0:
+            # if factor is found, set flag to True
+            flag = True
+            # break out of loop
+            break
+
+# check if flag is True
+if flag:
+    print(num, "is not a prime number")
+else:
+    print(num, "is a prime number")