How do you sum the elements in a list of integers using Python?

Adding Integers in Lists with Python

Imagine a scenario where you have a list of integers, like [2, 4, 7, 12, 3]. To determine their combined value (28), you need to sum all their individual values. Here's how you can do it using Python:

<code class="python"># Method 1: Using sum() function
x = [2, 4, 7, 12, 3]
sum_of_all_numbers = sum(x)</code>

The sum() function iterates over the list, aggregating all the integer values to provide the final sum.

Alternatively, you can employ a powerful Python function called reduce() to perform this summation:

<code class="python"># Method 2: Using reduce() with lambda function
x = [2, 4, 7, 12, 3]
sum_of_all_numbers = reduce(lambda q, p: p + q, x)</code>

The reduce() function cumulatively executes a specified function on each element in the list. In this case, we use a lambda function that adds two arguments (p and q) to perform the summation. This lambda function obviates the need to define a separate function for adding integers.

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