Python Coding Challange - Question With Answer(01080325)

 

Step-by-Step Execution:

1. The string assigned to equation is:

   
   '130 + 145 = 275'

2. The for loop iterates over each character (symbol) in the string.

3. The if condition:

   if symbol not in '11':

   • The expression '11' is a string, not a set of separate characters.
   • When Python checks symbol not in '11', it interprets it as:
     • "1" in "11" → True
     • "1" in "11" → True (again)
     • Any other character not in "11" → True (so it gets printed)
   • Effectively, the condition only excludes the character '1'.

4. The loop prints all characters except '1'.

---

Expected Output:

Removing '1' from the equation, we get:

3
0
+
4
5 
=
2
7
5

Key Observation:

• The not in '11' check works the same as not in '1' because Python does not treat "11" as separate characters ('1' and '1').
• '11' as a string is not a set or a list, so it doesn't mean "both instances of 1."
• This is why only '1' is removed.