In this tutorial, you will learn a simple **Python program to find the sum of an array**. To understand this Python program, you should have an understanding of the following concepts:

- Python programming language
- Variables and datatypes
- Lists
- Functions

We can do this by 2 methods. First, we can calculate the sum of all the elements in the array without using functions. Secondly, we can create a function to add all the elements of an array and then print the sum by calling that function.

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Let’s see how we can do this by these 2 methods.

## Python 3 Program To Find Sum of Array Without Function

**Source Code**:

Age = [10, 12, 13] #Inputting Array values. theSum = 0 #Definig variable to store the sum of array. for i in Age: #For loop to iterate through the array theSum = theSum + i #Adding array elements. print(theSum) #Outputting the sum of array elements.

## Output

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## Python 3 Program To Find Sum of Array Using Function

**Source code**:

Age = [10, 12, 13] def sumArray(): addition = 0 for i in Age: addition = addition + i print(addition) sumArray()

## Output

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