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Python String isalnum() Method

  • Difficulty Level : Basic
  • Last Updated : 12 Aug, 2021

Python String isalnum() method checks whether all the characters in a given string are alphanumeric or not. Alphanumeric means a character that is either a letter or a number.

Syntax: 

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string_name.isalnum() 



Parameter: 

isalnum() method takes no parameters 

Return: 

  • True: If all the characters are alphanumeric 
  • False: If one or more characters are not alphanumeric 

Example 1: Working of isalnum()

Python




# Python program to demonstrate the use of
# isalnum() method  
  
# here a,b and c are characters and 1,2 and 3
# are numbers
string = "abc123"
print(string.isalnum())
  
# here a,b and c are characters and 1,2 and 3 
# are numbers but space is not a alphanumeric 
# character
string = "abc 123" 
print(string.isalnum())

Output: 

True
False
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