all Python 3Strings (str)term

len() for strings

length

Returns the number of characters in a string. Every Unicode character counts as one.

Syntax

len(s)

len counts code points, not what the eye reads as one character: an emoji with a skin-tone modifier or a letter written with a separate combining accent comes out as 2 or more. Encode the same text to UTF-8 and the length changes — Cyrillic takes two bytes per letter there — so never mix up the length of a string with the length of its bytes. The call itself is O(1); the length is stored on the object.

Examples

print(len(''))
# → 0

print(len('hello'))
# → 5

print(len('   '))
# → 3

print(len('Привет'))
# → 6

s = 'test'
if len(s) > 3:
    print('длинная')
    # → 'длинная'

len() for strings

Syntax

Examples

See also