Python String Methods | Set 2 (len, count, center, ljust, rjust, isalpha, isalnum, isspace & join)
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, substring, beginning position( by default 0) and end position(by default string length).
# 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 elementprint (" 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 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 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 numbersif (str1.isalnum()): print ("All characters are numbers in str1")else : print ("All characters are not numbers in str1") # Checking if str1 has all spacesif (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 code to demonstrate working of # join()str = "_"str1 = ( "geeks", "for", "geeks" ) # using join() to join sequence str1 with strprint ("The string after joining is : ", end="")print ( str.join(str1)) |
Output:
The string after joining is : geeks_for_geeks
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