Loops in Python

What are loops in Python?

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Loops are a construct in programming that allow you to repeat a block of code multiple times. They are a powerful tool that enables you to automate repetitive tasks and process large amounts of data. In Python, there are two types of loops: for loops and while loops.

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For Loops:

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A for loop in Python is used to iterate over a sequence of values, such as a list, tuple, or string. The basic syntax of a for loop is as follows:

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In this example, we define a list of fruits and then use a for loop to iterate over each element in the list and print it to the console.

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You can also use the range() function to iterate over a sequence of numbers. For example:

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This code will print the numbers 0 through 4 to the console.

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The while loop

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The while loop is used to repeat a set of instructions as long as a certain condition is true. Here's an example:

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In this example, we start with a variable i that has a value of 0. We then use a while loop to print the value of i to the console and increment its value by 1 until i is no longer less than 5.

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Nested loops

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You can also use loops inside of other loops. This is known as nested looping. Here's an example:

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In this example, we use a for loop to iterate over the numbers 0 through 2, and then use a nested for loop to iterate over the numbers 0 through 1 for each value of i. This will print the pairs (0, 0), (0, 1), (1, 0), (1, 1), (2, 0), and (2, 1) to the console.

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Conclusion

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Loops are an essential part of Python programming. They allow you to repeat a set of instructions multiple times without having to write them out every single time. There are two main types of loops in Python: the for loop and the while loop. You can also use loops inside of other loops (nested looping) to create more complex programs.

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