for loop in array python

stackoverflow.com › questions › 52450877 › python-for-loop-iterate-array

Your code, as written, is close:

opnDays = ["mon", "tue", "wed", "thr", "fri"]

price = 10

def discount(array):
    disPrice = price
    for day in array:
        disPrice *= 0.9
        print(day, disPrice)

What I did here was change how disPrice was set on your loop. You were setting it to the same value (0.9 * price) on every iteration. All I did was set it to price in the beginning and multiply it by 0.9 every iteration, resulting in the desired behavior.

Answer from Woody1193 on Stack Overflow

W3Schools

w3schools.com › python › gloss_python_array_loop.asp

Python Loop Through an Array

Python Examples Python Compiler ... Study Plan Python Interview Q&A Python Training ... You can use the for in loop to loop through all the elements of an array....

Tutorialspoint

tutorialspoint.com › python › python_loop_arrays.htm

Python - Loop Arrays

import array as arr # creating ... of array with built-in len() function. Use it to create a range object to get the series of indices and then access the array elements in a for loop....

Discussions

Why iterate over an array using the index?

You do it if there is something in your loop that will use an index rather than the elements of the array. For instance, sometimes you want to sample something from another array that is not your loop array A cleaner way to do it is by using enumerate function for i, item in enumerate(array): The index gets assigned to i and whatever element of the array gets assigned to item. This may also be a bad habit from Matlab, people that come from Matlab are more used to looping over indexes. More on reddit.com

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How can I loop through an array forward and then backwards and then forwards and... etc with the modulus operator?

Given `n` is 1 less than the length of your array, you can increment and modulus some rotating index `i` against double `n` and then subtract `n`, take the absolute value and you get a bouncing number. It should be noted that you don't need to use any flags as suggested in other comments, but you do lose readability. Explanation: Take your example for an array of length 5, then `n=4`, `i` will rotate through values `[0, 1, 2, 3, 4, 5, 6, 7]` and subtracting `n` from each we get `[-4, -3, -2, -1, 0, 1, 2, 3]`, and the absolute values become `[4, 3, 2, 1, 0, 1, 2, 3]` which you can use to access the values at an index in your array. Try the following code: arr = [1, 2, 3, 4, 5] n = len(arr) - 1 i = n while True: curr_index = abs(i - n) print(arr[curr_index]) i = (i + 1) % (2 * n) and you will get output that looks like: 1 2 3 4 5 4 3 2 1 2 3 4 ... More on reddit.com

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Storing arrays in Python for loop - Stack Overflow

Let's say I have a function (called numpyarrayfunction) that outputs an array every time I run it. I would like to run the function multiple times and store the resulting arrays. Obviously, the cur... More on stackoverflow.com

stackoverflow.com

Loop over an an array of array

I have an array of arrays I want to loop over to return two arrays called hills and valleys. When looping through each element, we check the item at index 1 that is element[0] if the value is equal to zero, we create another array and push the value inside. we keep a trace of it still when ... More on discuss.python.org

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