ValueError

Common Causes

• Parsing invalid string to int/float
• Empty or malformed input
• Wrong format passed to built-in

Fixes

1. 1. Validate before converting

   s = input().strip()
   if s.isdigit():
       n = int(s)

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2. 2. Use try/except

   try:
       n = int(s)
   except ValueError:
       n = default

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3. 3. Handle empty input

   n = int(s) if s else 0

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Still not fixed?

• • Search the exact error message on Stack Overflow or GitHub Issues
• • Check the official docs for the language or tool
• • Ensure your versions (Node, Python, npm, Docker) are up to date
• • Try in a minimal reproduction (new project, single file)

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