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 element print ( " Number of appearance of " "geeks" " is : " ,end = "")
print ( str .count( "geeks" , 0 , 15 ))
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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 , '-' ))
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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 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" )
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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 str print ( "The string after joining is : " , end = "")
print ( str .join(str1))
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Output:
The string after joining is : geeks_for_geeks