Added program to calculate sum of n numbers using two different methods

SimpleAddition/n_number_sum.py

@@ -0,0 +1,56 @@
+'''
+This is a program to find the sum of 'n' numbers given by the user.
+We'll see the use of two different methodology : 1st => using list 
+                                                 2nd => using for loop   
+'''
+
+# *****************
+# First Methodology
+# *****************
+
+
+#Defining numbers' array(list) with 'arr' as the name 
+arr = []
+
+
+#number of numbers
+n = int(input("How Many Numbers will you enter ? "))
+
+
+#loop to get all numbers and add them to the array list
+for i in range(1,n+1):
+
+    #take the number from user and store it in a temporary variable 'inp'
+    inp = int(input("Enter the {0} number : ".format(i)))
+
+    #adding the given value to our list 
+    arr.append(inp)
+
+# Finally get the result using the  sum function which returns the addition of all contents of a list (any interable) 
+print("Sum : " + str(sum(arr)))
+
+
+# ***********************************
+# 2nd Methodology using for loop: 
+# ***********************************
+
+
+#number of inputs
+n = int(input("How Many Numbers will you enter ?"))
+
+
+#intitializing a temporary variable to store the sum
+s = int()
+
+
+#loop to get all numbers and keep adding them to a variable
+for i in range(1,n+1):
+
+    # Getting the number from user
+    inp = int(input(f"Enter the {i} number : "))
+
+    # Add the input vale to the given variable    
+    s += inp # equivalent to sum = sum + inp
+
+
+print("Sum : "+ str(s))