diff --git a/OddOrEven.py b/OddOrEven.py
index 2a7921d..4ad971c 100644
--- a/OddOrEven.py
+++ b/OddOrEven.py
@@ -1,5 +1,5 @@
 n = int(input("Enter a number"))
-if(n%2==0):
+if n%2==0:
     print("Even number.")
 else:
     print("Odd number.")
diff --git a/factorial.py b/factorial.py
new file mode 100644
index 0000000..e2af6fa
--- /dev/null
+++ b/factorial.py
@@ -0,0 +1,10 @@
+n=int(input("enter a number"))
+factorial=1
+if n<0:
+   printf("factorial does not exist")
+elif n==0:
+   printf("factorial of 0 is 1")
+else:
+for i in range(1,n+1):
+  factorial=factorial*i
+  printf("factorial is ",factorial)
diff --git a/recursion_factorial.py b/recursion_factorial.py
new file mode 100644
index 0000000..3b4fff9
--- /dev/null
+++ b/recursion_factorial.py
@@ -0,0 +1,9 @@
+
+def calc_factorial(x):
+  if x==1:
+     return 1
+  else:
+     return(x*calc_factorial(x-1))
+num=int(input("enter number"))
+printf("factorial is ",calc_factorial(num))
+