diff --git a/Python/Largest_Sub_Array_Sum.py b/Python/Largest_Sub_Array_Sum.py
new file mode 100644
index 0000000..dea04d8
--- /dev/null
+++ b/Python/Largest_Sub_Array_Sum.py
@@ -0,0 +1,18 @@
+from sys import maxint 
+def maxSubArraySum(a,size): 
+
+    max_so_far = -maxint - 1
+    max_ending_here = 0
+
+    for i in range(0, size): 
+        max_ending_here = max_ending_here + a[i] 
+        if (max_so_far < max_ending_here): 
+            max_so_far = max_ending_here 
+
+        if max_ending_here < 0: 
+            max_ending_here = 0   
+    return max_so_far 
+
+
+a = [1,2,3,-9,52,-12,-13,-15,19,15,100,-99] 
+print "Maximum contiguous sum is", maxSubArraySum(a,len(a))