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Summing values in Python can be efficiently done using the built-in sum() function. This function takes an iterable and returns the sum of its elements.
Example
numbers = [1, 2, 3, 4, 5]total = sum(numbers)print(total) # Output: 15The sum() function can also take an optional start parameter, which is added to the sum of the iterable's items.
Example with Start Parameter
numbers = [1, 2, 3, 4, 5]total = sum(numbers, start=10)print(total) # Output: 25Using a For Loop
Alternatively, you can use a for loop to sum values.
numbers = [1, 2, 3, 4, 5]total = 0for number in numbers:total += numberprint(total) # Output: 15Using List Comprehension
You can also use list comprehension with the sum() function.
total = sum([x for x in range(1, 6)])print(total) # Output: 15Using Recursion
Recursion can be used for summation as well.
def sum_numbers(numbers):if not numbers:return 0return numbers[0] + sum_numbers(numbers[1:])print(sum_numbers([1, 2, 3, 4, 5])) # Output: 15Important Considerations
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Jan 13, 2022 · sum(...) can be used with an iterable: numbers = [1, 2, 3, 4] print(sum(numbers)) Using a for loop you have to save sum in a variable and store result into this. Example: …
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Jan 24, 2025 · One of the most basic ways to perform summation in Python is by using a for loop. This method iterates over each element in a sequence and adds it to a running total. total += …
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Jan 5, 2025 · While we have the Python built-in function sum() which sums the elements of a sequence (provided the elements of the sequence are all of numeric type), it’s instructive to …
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Dec 9, 2023 · However, there are several ways to perform summation in Python. 1. Using the sum() function: The built-in sum() function is the most common way to perform summation in …
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