Python String isalpha() Function

The String isalpha() method returns True if the string is not empty and all the characters are alphabetic. Otherwise, it returns False.

note

A character is alphabetic if it is either a letter [a-z] or [A-Z].

Syntax

my_string.isalpha()

isalpha() Parameters

Python String isalpha() function does not take any parameters.

isalpha() Return Value

Python String isalpha() function returns:

• True if ALL characters in the string are alphabetic.
• False if AT LEAST ONE character is NOT alphabetic (numbers, symbols, etc.).

Examples

Example 1: Check if a String is alphabetic with isalpha()

The isalpha() method returns True if all characters are alphabetic.

For example, let's check if all characters in the string abcDEF are alphabetic:

my_str = 'abcDEF'
result = my_str.isalpha()
print(result) # Output: True

output

True

Example 2: Check if a String with Numbers is alphabetic with isalpha()

The isalpha() method returns False if at least one character is not alphabetic. Numbers [0-9] are NOT alphabetic characters!

my_str = 'abc123'
result = my_str.isalpha()
print(result) # Output: False

output

False

Example 3: Check if a String with Special Characters is alphabetic with isalpha()

The isalpha() method returns False if at least one character is not alphabetic. Special characters are NOT alphabetic characters!

my_str = 'abc@DEF'
result = my_str.isalpha()
print(result) # Output: False

output

False

Example 4: Check if an empty String is alphabetic with isalpha()

The isalpha() method returns False if the string is empty.

my_str = ''
result = my_str.isalpha()
print(result) # Output: False

output

False