discription
str.isalnum()
This method checks if all the characters of a string are alphanumeric (a-z, A-Z and 0-9)
str.isalpha()
This method checks if all the characters of a string are alphabetical (a-z and A-Z)
str.isdigit()
This method checks if all the characters of a string are digits (0-9)
str.islower()
This method checks if all the characters of a string are lowercase characters (a-z)
str.isupper()
This method checks if all the characters of a string are uppercase characters (A-Z)
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Python hackerrank problem 1 || Problem Solution Hackerrank ||Program || hackerrank with basics code
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