Code lines implementation

[mirjam]

Hi,

I am kindly asking to help me with the implementation of each line of the following python code. Thank you very much.

sum = 0
for x in range(1000):
    if str(x) == str(x)[::-1]:
        sum += x ** 2
print(sum)

Larz60+ write Jun-04-2022, 10:40 AM:
Please post all code, output and errors (it it's entirety) between their respective tags. Refer to BBCode help topic on how to post. Use the "Preview Post" button to make sure the code is presented as you expect before hitting the "Post Reply/Thread" button.
Fixed for you this time. Please use BBCode tags on future posts

[jefsummers]

summary = 0 #sum is a keyword in Python. Do not use as a variable. This creates the variable summary and sets its value to zero
for x in range(1000): #this creates a loop such that the indented code below is executed 1000 times, with x ranging from 0 to 999
    if str(x) == str(x)[::-1]: #compares the first digit of the number x to the last digit. x was created by the for loop above. If same execute indented lines below
        summary += x ** 2 #add the square of x to summary. This is shorthand for summary = summary + x**2
print(summary) #print the value of summary once the loop is complete (not indented)

[deanhystad]

This tests if x is a palindrome like 1, 22, 303, 12321

if str(x) == str(x)[::-1]:

The -1 index slice ([::-1]) reverses the order of characters in str(x)