python for loop append to list
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title: python for loop - append to list tutorial
introduction:
in python, a for loop is a powerful and versatile tool for iterating over a sequence (such as a list, tuple, or string). one common use of for loops is to append elements to a list dynamically. this tutorial will guide you through the process of using a for loop to append elements to a list in python.
step 1: understanding the basics of lists:
before we dive into the for loop, let's review the basics of python lists. lists are ordered, mutable sequences that can contain various data types. you can create an empty list using square brackets [] and append elements using the append() method.
step 2: using a for loop to append elements:
now, let's explore how to use a for loop to dynamically append elements to a list. we'll create a simple example where we append the square of each number from 1 to 5 to a list.
in this example, the range(1, 6) generates numbers from 1 to 5 (inclusive), and the for loop iterates over each number. inside the loop, we calculate the square of the current number (number ** 2) and append it to the squares list using the append() method.
step 3: applying conditions in for loop:
you can also use conditions within a for loop to selectively append elements to the list. in this example, we'll append only the even squares to the list.
in this case, the if square % 2 == 0 condition checks if the square is an even number before appending it to the even_squares list.
conclusion:
the for loop is a versatile tool for iterating over sequences in python. by combining it with the append() method, you can dynamically build lists based on the desired logic. practice and experiment with for loops to enhance your understanding and proficiency in python programming.
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