From cc24169a6f5bd8f5867ab8155f65e2a82689a7ac Mon Sep 17 00:00:00 2001
From: 23f3002809 <23f3002809.ds.study.iitm.ac.in>
Date: Mon, 26 Jan 2026 00:08:04 +0530
Subject: [PATCH] Implemented the required functions

---
 generate_numbers.py | 25 +++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)

diff --git a/generate_numbers.py b/generate_numbers.py
index bef48ad..9ec7b67 100644
--- a/generate_numbers.py
+++ b/generate_numbers.py
@@ -1,12 +1,25 @@
 def natural_numbers(n):
-    #Returns the list of natural numbers
-    #Code here
+    return list(range(1, n + 1))
 
 
 def nth_fibonacci(n):
-    #Returns n-th fibonacci number
-    #Code here
+    if n <= 0:
+        return None
+    if n == 1:
+        return 0
+    if n == 2:
+        return 1
+
+    a, b = 0, 1
+    for _ in range(3, n + 1):
+        a, b = b, a + b
+    return b
+
 
 def is_prime(n):
-    #Return true if 'n' is prime, otherwise returns false
-    #Code here
\ No newline at end of file
+    if n <= 1:
+        return False
+    for i in range(2, int(n ** 0.5) + 1):
+        if n % i == 0:
+            return False
+    return True