diff --git a/diagonaldifference b/diagonaldifference
new file mode 100644
index 0000000..975e8c0
--- /dev/null
+++ b/diagonaldifference
@@ -0,0 +1,22 @@
+def diagonalDifference(arr) #function accepting a 2d array
+
+  sum1=0
+  sum2=0
+  res=0
+  for i in range(0,len(arr)):
+  sum1=sum1+arr[i][i]
+  sum2=sum2+arr[i][(len(arr)-1)-i]
+  res=sum1-sum2
+  return abs(res)
+if __name__ == '__main__':
+fptr = open(os.environ['OUTPUT_PATH'], 'w')
+
+n = int(input().strip) #size
+
+arr = []
+
+for _ in range(n):
+arr.append(list(map(int, input().rstrip().split())))
+
+print( diagonalDifference(arr))
+