sum()
sum() is a Python function in the Built-in Functions category. Sums the items of an iterable from left to right, starting with `start`. The syntax is sum(iterable, start=0). Parameters: iterable — numeric iterable. Returns: Total sum. A typical example: sum([1, 2, 3]) # 6
sum([1, 2, 3], 10) # 16. A close sibling is print(), which prints objects to the text stream, separated by `sep` and followed by `end`. A close sibling is len(), which returns the length (number of items) of an object. Works with sequences, collections, and strings. A close sibling is range(), which returns an immutable sequence of numbers. Commonly used in for loops. A close sibling is type(), which returns the type of an object, or creates a new type with three arguments. More about this category: Python's built-in functions available without importing — print, len, range, map, and more. For a broader walkthrough, read the Built-in Functions guide.