valueerror-invalid-literal-for-int

ValueError: invalid literal for int() with base 10

Occurs when trying to convert a non-numeric string into an integer.

Reproduce

value = "abc"
number = int(value)

Error message

Traceback (most recent call last):
  File "reproduce.py", line 2, in <module>
    number = int(value)
ValueError: invalid literal for int() with base 10: 'abc'

Fix

value = "123"
if value.isdigit():
    number = int(value)
    print(number)

Output

123

Reflection

The string "abc" cannot be converted to an integer. Check if the string contains only digits before using int().