Python String Methods | Set 2 (len, count, center, ljust, rjust, isalpha, isalnum, isspace & join)
Last Updated :
07 Jul, 2022
Some of the string methods are covered in the set 3 below
String Methods Part- 1
More methods are discussed in this article
1. len() :- This function returns the
length of the string.
2. count("string", beg, end) :- This function
counts the occurrence of mentioned
substring in whole string. This function takes 3 arguments, s
ubstring, beginning position( by default 0) and end position(by default string length).
Python
# Python code to demonstrate working of
# len() and count()
str = "geeksforgeeks is for geeks"
# Printing length of string using len()
print (" The length of string is : ", len(str));
# Printing occurrence of "geeks" in string
# Prints 2 as it only checks till 15th element
print (" Number of appearance of ""geeks"" is : ",end="")
print (str.count("geeks",0,15))
Output:
The length of string is : 26
Number of appearance of geeks is : 2
3. center() :- This function is used to
surround the string with a character repeated both sides of string multiple times. By default the character is a space. Takes 2 arguments,
length of string and the character.
4. ljust() :- This function returns the
original string shifted to left that has a
character at its right. It left adjusts the string. By default the character is space. It also takes two arguments,
length of string and the character.
5. rjust() :- This function returns the
original string shifted to right that has a
character at its left. It right adjusts the string. By default the character is space. It also takes two arguments,
length of string and the character.
Python
# Python code to demonstrate working of
# center(), ljust() and rjust()
str = "geeksforgeeks"
# Printing the string after centering with '-'
print ("The string after centering with '-' is : ",end="")
print ( str.center(20,'-'))
# Printing the string after ljust()
print ("The string after ljust is : ",end="")
print ( str.ljust(20,'-'))
# Printing the string after rjust()
print ("The string after rjust is : ",end="")
print ( str.rjust(20,'-'))
Output:
The string after centering with '-' is : ---geeksforgeeks----
The string after ljust is : geeksforgeeks-------
The string after rjust is : -------geeksforgeeks
6. isalpha() :- This function returns true when all the characters in the string are
alphabets else returns false.
7. isalnum() :- This function returns true when all the characters in the string are
combination of numbers and/or alphabets else returns false.
8. isspace() :- This function returns true when all the characters in the string are
spaces else returns false.
Python
# Python code to demonstrate working of
# isalpha(), isalnum(), isspace()
str = "geeksforgeeks"
str1 = "123"
# Checking if str has all alphabets
if (str.isalpha()):
print ("All characters are alphabets in str")
else : print ("All characters are not alphabets in str")
# Checking if str1 has all numbers
if (str1.isalnum()):
print ("All characters are numbers in str1")
else : print ("All characters are not numbers in str1")
# Checking if str1 has all spaces
if (str1.isspace()):
print ("All characters are spaces in str1")
else : print ("All characters are not spaces in str1")
Output:
All characters are alphabets in str
All characters are numbers in str1
All characters are not spaces in str1
9. join() :- This function is used to
join a sequence of strings mentioned in its arguments with the string.
Python
# Python code to demonstrate working of
# join()
str = "_"
str1 = ( "geeks", "for", "geeks" )
# using join() to join sequence str1 with str
print ("The string after joining is : ", end="")
print ( str.join(str1))
Output:
The string after joining is : geeks_for_geeks
Python String Methods - Part 1
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