Python String isalnum() method

Python String isalnum() method

The string.isalnum () method in Python returns a boolean value true if all characters in the string are alphanumeric else for any other value it returns false.

Syntax

String.isalnum()

Parameter

NA

Return

This method returns a Boolean value True if all the given characters are alphanumeric.

Example 1

 # Python programing explaining
 # the isalnum() method
 # initializing a alhanumeric value without validating any space 
 strVal = "July2019"; 
 print (strVal.isalnum())
 # passing string value
 strVal = "Hello World !!";
 print (strVal.isalnum()) 

Output

True
False

Example 2

 # Python programing explaining
 # the isalnum() method
 # initializing a string value
 strVal = "M0n1caG3ll3r"
 # validating if and else condition
 if strVal.isalnum() == True:
    print("All characters of specified string are alphanumeric.")
 else:
     print("All the characters are not alphanumeric.") 

Output

All characters of specified string are alphanumeric.

Example 3

 # Python programing explaining
 # the isalnum() method
 # initializing a string value
 # will return true
 char1 = "M234onica"
 print(char1.isalnum())
 # contains whitespace
 # will return False as it contains space
 char2 = "M3onica Gell22er "
 print(char2.isalnum())
 #passing special characters 
 # will return false as it contains special characters
 char3 = "!Mo3nica*$Gell22er"
 print(char3.isalnum())
 # passing all integers
 # will return true as it is alphanumeric
 char4 = "133"
 print(char4.isalnum()) 

Output

 True
 False
 False
 True