Last answered:

07 Nov 2022

Posted on:

06 Nov 2022


Doubt regarding a code

def two(l):
  for ch in l:
    if ch[a]+ch==10:
      print(ch and ch[a])
This is the code for (Two sum )video ...
Pls let me know where I went wrong.

1 answers ( 0 marked as helpful)
Posted on:

07 Nov 2022


Hey Vignesh,

Thank you for reaching out!

Let's examine the following screenshot, where I've copy-pasted your solution.
It is important to make sure you understand what each of the variables represents. In line 1, you create a function two() which takes a single argument (of type list) that you've called l.

Then, in line 2, the for-loop is constructed as follows:

for ch in l:

This line of code implies iteration through the list l - it picks up each number from the list. Therefore, the iterator ch is an integer.

Later, in lines 5 and 6 you use ch[a]. However, since ch is an integer, it is not subscriptable. That is to say, it cannot be followed by [a].

Hope this helps!

Kind regards,
365 Hristina

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