diff --git a/t01primeshcflcm_hcf4.py b/t01primeshcflcm_hcf4.py
index 6ed4cad..2721713 100644
--- a/t01primeshcflcm_hcf4.py
+++ b/t01primeshcflcm_hcf4.py
@@ -1,4 +1,14 @@
 # Find the HCF of n positive integers.
 
-n = 
-
+def gcd(a, b): 
+    while(b): 
+        (a, b) = (b, a % b)
+    return a
+  
+numbers = [1, 2, 3, 4, 5] 
+num1 = numbers[0] 
+num2 = numbers[1]
+gcdnum = gcd(num1,num2)
+for i in range(2,len(numbers)): 
+    gcdnum  = gcd(gcdnum, numbers[i]) 
+print(gcd)