Python String istitle() Method

The istitle() method checks whether each word's first character is upper case and the rest are in lower case or not. It returns True if a string is titlecased; otherwise, it returns False. The symbols and numbers are ignored.

Syntax:

str.istitle()

Parameters:

None.

Return Value:

Returns boolean value True if the string is titlecased otherwise returns False.

The following example demonstrates the istitle() method.

>>> greet='Hello World'
>>> greet.istitle()
True
>>> greet='Hello WORLD'
>>> greet.istitle()
False
>>> greet='hello world'
>>> greet.istitle()
False
>>> greet='HelloWorld'
>>> greet.istitle()
False
>>> s='Python Is A Programming Language'
>>> s.istitle()
True

If the first character is a number or special symbol, then it will be treated as a capital letter.

>>> addr='#1 Harbor Side'
>>> addr.istitle()
True
>>> addr='1 Central Park'
>>> addr.istitle()
True

An empty string, numeric string, or a string with only symbols are not considered titlecased.

>>> empt=''
>>> empt.istitle()
False
>>> numstr='100'
>>> numstr.istitle()
False
>>> usd='$'
>>> usd.istitle()
False

Generally, the istitle() method is used with the title() method to check a string before converting it in a titlecased, as shown below.

ustr=input()
if not ustr.istitle():
   ustr = ustr.title()
   print('Converted to TitleCase', ustr)
    
print('You entered a TitleCase string')