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How can a while loop be used to read lines from a file until the end is reached?

hard📝 Application Q9 of 15
Python - While Loop
How can a while loop be used to read lines from a file until the end is reached?
AUse while loop to read each line until no more lines
BUse for loop with fixed number of lines
CUse if statement to read one line
DUse recursion instead of loop
Step-by-Step Solution
Solution:

  1. Step 1: Understand file reading

    Reading lines continues until no more lines are left, unknown count.

  2. Step 2: Use while loop for unknown length

    While loop can read lines until an empty line or end is reached.

  3. Final Answer:

    Use while loop to read each line until no more lines -> Option A

  4. Quick Check:

    While loop reads unknown lines until end [OK]
Quick Trick: While loops read until condition (like EOF) is met [OK]
Common Mistakes:
MISTAKES
  • Using for loop without knowing line count
  • Reading only one line with if
  • Confusing recursion with loops

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