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PYTHON PROGRAM • STRINGS

Find a Substring in Python

Learn find a substring in python with a short, executable Python example.

Beginnerfind()in operator

PROBLEM UNDERSTANDING

Input and expected output

Sample input
No input required
Sample output
6 True

COMPLETE PYTHON PROGRAM

Complete Python implementation

python-substring-search.py
Open in compiler
text = 'Learn Python at CodeBhavya'
word = 'Python'
print(text.find(word), word in text)

GUIDED CODE TOUR • NOT LIVE EXECUTION

Study the program line by line

Use the real compiler button above to run and debug with different inputs.

CURRENT STEP

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SELECTED LINE

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EXPECTED OUTPUT FOR THE SAMPLE

6 True
0%Step 0 of 0

PROGRAM EXPLANATION

Algorithm and explanation

  1. Initialize the sample values used to find a substring.
  2. Apply find() and in operator to compute the required result.
  3. Display the result for find a substring and compare it with the documented sample output.

This example of find a substring computes the result directly from the prepared sample data. It demonstrates find() and in operator and prints a deterministic result that can be checked against the sample output.

EFFICIENCY

Time and space complexity

Time complexity

O(n)

Auxiliary space

O(n)

DEBUGGING CHECKLIST

Common mistakes

Check this

For find a substring, keep the data shape and value types consistent with find().

Check this

Apply find() in the same order shown by the algorithm; changing the order can change the result.

Check this

Verify the final find() and in operator result against the sample before trying new data.

Try it yourself

Practice: Run the program with the sample input, predict its output, and then test one boundary case of your own.