Python String isalpha() Method

The isalpha() method checks if all characters in a given string are alphabetic. It returns True if every character in the string is a letter and False if the string contains any numbers, spaces, or special characters.

Let’s start with a simple example of using isalpha()

s1 = "HelloWorld"
res1 = s1.isalpha()
print(res1)

s2 = "Hello123"
res2 = s2.isalpha()
print(res2)

True
False

Explanation: The string s1 are contains only alphabetic characters, so isalpha() returns True but the string s2 contains non-alphabetic characters so isalpha() returns False

Syntax of isalpha() Method

string.isalpha()

Parameter:

• No parameters are required.

Return Type: Returns True if all characters in string are alphabetic (A-Z, a-z) and False otherwise.

Example of isalpha() Method

Example 1: String with Space

s = "Hello World"
print(s.isalpha())

False

Explanation: Since s contains a space which is not an alphabetic character, so isalpha() returns False.

Example 2: String with Numbers

s = "Python123"
print(s.isalpha())

False

Explanation: Here, s contains numbers, so isalpha() returns False.

Example 3: String with Special Characters

s = "Python!"
print(s.isalpha())

False

Explanation: Since the string s contains the special character !, it is not purely alphabetic, so isalpha() returns False.