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In programming, a loop variable is used to control the number of times a loop runs. For example, in Python, you can use a loop variable like "i" in a for loop to iterate over a list of numbers:

python numbers 1, 2, 3, 4, 5 for i in numbers: print(i)

In this code snippet, the loop variable "i" is used to iterate over each number in the list "numbers" and print it out.

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