Python list comprehension range of numbers

Python list comprehension range of numbers

I'd be happy to help!

In Python, a list comprehension is a concise way to create a new list from an existing iterable by applying a specified operation or filtering criteria. One common use case is generating a range of numbers.

Let's start with the basics. The range() function generates an iterator that produces a sequence of numbers starting from 0 (or any specified value) up to, but not including, a specified stop value. For example:

numbers = list(range(1, 6))  # [1, 2, 3, 4, 5]
print(numbers)

Now, let's get creative with some list comprehensions!

Range of numbers (simple)

Here's a basic list comprehension that generates the same range as range():

numbers = [i for i in range(1, 6)]
print(numbers)  # [1, 2, 3, 4, 5]

Range of numbers (with increment)

What if we want to generate a range with an incremental step size? No problem!

numbers = [i for i in range(0, 11, 2)]  # [0, 2, 4, 6, 8, 10]
print(numbers)

Range of numbers (negative)

What if we want to generate a range with negative values? Here's an example:

numbers = [i for i in range(-5, 1)]  # [-5, -4, -3, -2, -1, 0]
print(numbers)

Range of numbers (odd/even)

Here's a more interesting use case: generating only odd or even numbers!

even_numbers = [i for i in range(0, 10) if i % 2 == 0]  # [0, 2, 4, 6, 8]
print(even_numbers)
odd_numbers = [i for i in range(1, 11) if i % 2 != 0]  # [1, 3, 5, 7, 9]
print(odd_numbers)

Range of numbers (custom start/stop)

Finally, let's generate a custom range with any starting and stopping values:

numbers = [i for i in range(-10, 15)]  # [-10, -9, -8, ..., 14]
print(numbers)

These examples demonstrate the versatility of Python list comprehensions when working with ranges. With just a few lines of code, you can generate various types of sequences, from simple to complex!

Now, go forth and create your own magnificent list comprehensions!

Python number in list

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