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1. Check Anagram2. Check if Substring Exists3. Count Substring Occurrences4. Extract Numbers from String5. Sum of Numbers in String6. Check if All Characters Same7. Remove Adjacent Duplicates8. Find First Non-Repeating Character9. Find Most Frequent Character10. Check String Rotation11. Longest Common Prefix12. String Compression13. Valid Parentheses Check14. Reverse Words in String

Extract Numbers from String

Extract all numbers from string.

AdvancedPhase 5 - Category 5: Advanced String LogicExample 4 of 14
extract-numbers-from-string.py
1# Take string input
2s = input("Enter a string: ")
3

4# Extract numbers
5numbers = []
6current_num = ""
7for char in s:
8    if char.isdigit():
9        current_num += char
10    else:
11        if current_num:
12            numbers.append(int(current_num))
13            current_num = ""
14if current_num:
15    numbers.append(int(current_num))
16

17print(f"Numbers: {numbers}")

Output

Enter a string: Hello123World456
Numbers: [123, 456]

What's going on

Build numbers character by character.

Key Concepts:

Track current number being built
Add digit to current number
Convert to int when complete

🔗Related Content

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