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The isalnum method

The isalnum method checks that the characters of a string are only letters and numbers. Nothing is passed to the method parameters. The method returns the values ​​True or False.

Syntax

pythonstring.isalnum()

Example

Let's check that the string consists only of letters and numbers: 

pythontxt = 'abcadea12'
print(txt.isalnum())

Result of code execution: 

pythonTrue

Example

Let the line now contain other characters: 

pythontxt = '@abcadea12'
print(txt.isalnum())

Result of code execution: 

pythonFalse

See also

  • method isalpha,
    which checks if a string contains only letters
  • method isdigit,
    which checks if a string contains only numbers
  • method isnumeric,
    which checks if a string contains only numbers
  • method isspace,
    which checks if a string contains only spaces
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