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Functions & basics medium

How to Create a Counter Closure in Python

Build a closure in Python that remembers and increments a counter across calls without using global variables.

closures nonlocal state
Python
def create_counter(start=0):
    count = start
    def increment():
        nonlocal count
        count += 1
        return count
    return increment

if __name__ == "__main__":
    counter = create_counter(10)
    print(counter())
    print(counter())
    print(counter())
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