The element with index zero is removed by the popleft function.
What does function mean?
Simply said, a function is a "chunk" or code that you can reuse repeatedly rather than having to write it out several times. Programmers can divide an issue into smaller, more manageable parts, each of which can carry out a specific task, using functions. Every programming language enables the creation of code blocks that, when executed, carry out certain tasks. These coding fundamental pieces are known as functions in programming.
There are input and output in every programming function. Then whenever they need it, they may call it.
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