AllAlgorithms
diff --git a/‎math/factorial.py
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+21Lines changed: 21 additions & 0 deletions b/‎math/factorial.py
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+21Lines changed: 21 additions & 0 deletions
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+'''
+To find factorial of a number
+'''
+def factorial(num):      #recursive function
+	if num==1 or num==0:
+		return 1
+	else:
+		return factorial(num-1)*num    #function calling itself
+
+num=int(input("Enter the number to find factorial:"))
+'''
+To check whether the number inputted is positive or not
+'''
+while num<0:
+	print("INVALID INPUT !")
+	num=int(input("Enter the number to find factorial:"))
+'''
+function calling
+'''	
+x=factorial(num)
+print("Factorial of ",num," is ",x)