string functions in python 3 with examples | string methods in Python examples

string functions in python 3 with examples

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1. capitalize() method in Python 3

capitalize() function in Python makes first character of string capital.

Example

>>> name='lovejot'
>>> name.capitalize()
'Lovejot'

#First character becomes capital




 2. find()  method in Python 3

find() method  in Python is used to find first index position of substring in a string value. It returns-1 if substring is not found.

Syntax:

String.find (Substr[,Start[,End]])

Substr refers to substring we want to find in String.

Start refers to starting index.

End refers to ending index of range in which we have to find substring.

 Example

>>> name='lovejot'
>>> name.find('o')
1

#Index of first occurance of ‘o’ is shown i.e. 1.

>>> name.find('o',2,7)
5

#Index of ‘o’ in index range 2,7 is shown i.e. 5.

3. isalnum() method in Python 3

isalnum() method  in Python return True if string contains alphabets or digits. There must be at least one character in String.

Example

>>> name='lovejot'
>>> name.isalnum()
True

>>> name1='lovejot2019'
>>> name1.isalnum()
True

4. isalpha() method in Python 3

isalpha() method in Python return True if string contains alphabets only. There must be at least one character in String.

Example

>>> name='lovejot'
>>> name.isalpha()
True

>>> name1='lovejot2019'
>>> name1.isalpha()
False



5. isdigit() method in Python 3

isdigit() method  in Python return True if string contains digits only. There must be at least one character in String.

Example

>>> name='123'
>>> name.isdigit()
True

>>> name1='lovejot2019'
>>> name1.isdigit()
False

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6. islower() method in Python 3

islower() method in Python return True if string contains lower case alphabets only. There must be at least one character in String.

Example

>>> name='lovejot'
>>> name.islower()
True

>>> name1='Lovejot'
>>> name1.islower()
False

#First character is capital in ‘Lovejot’.

7. isupper() method in Python 3

isupper() method in Python return True if string contains upper case alphabets only. There must be at least one character in String.

Example

>>> name='LOVEJOT'
>>> name.isupper()
True

>>> name1='Lovejot'
>>> name1.isupper()
False

#Only first character is Capital



8. isspace() method in Python 3

isspace() method in Python return True if string contains space only. There must be at least one character in String.

Example

>>> name=' '
>>> name.isspace()
True

>>> name1=” “
>>> name1.isspace()
True

9. lower() method in Python 3

lower()  method in Python converts string value into lowercase. There must be at least one character in String.

Example

>>> name='LOVEJOT '
>>> name.lower()
'lovejot'

>>> name1=”LOVEJOT2019“
>>> name1.lower()
'lovejot2019'



 10. upper() method in Python 3

upper() method of Python converts string value into capital letters. There must be at least one character in String.

Example

>>> name='lovejot '
>>> name.upper()
'LOVEJOT'

>>> name1=”lovejot2019“
>>> name1.upper()
'LOVEJOT2019'

 11. lstrip() method in Python 3

lstrip()  method in Python removes spaces or specified character from the beginning of a string. There must be at least one character in String.

Syntax:

String. lstrip  ([ Char])

Char refers to the character that needs to be removed from the beginning of a String. All consecutive occurrences of character will be removed.

Example

>>> name='   lovejot   ';
>>> name.lstrip()
'lovejot   '

#Spaces removed from the beginning

>>> name1='**lovejot**'
>>> name1.lstrip('*')
'lovejot**'

#*s removed from the beginning.



12. rstrip() method in Python 3

rstrip() method in Python removes spaces or specified character from the end of a string. There must be at least one character in String.

Syntax:

String. rstrip  ([ Char])

Char refers to the character that needs to be removed from the end of a String. All consecutive occurrences of character will be removed.

Example

>>> name='   lovejot   ';
>>> name.rstrip()
'  lovejot'

#Spaces removed from the end.

>>> name1='**lovejot**'
>>> name1.rstrip('*')
'**lovejot'

#*s removed from the end.

13. strip() method in Python 3

strip() method in Python removes spaces or specified character from both the ends of a string. There must be at least one character in String.

Syntax:

String. strip  ([ Char])

Char refers to the character that needs to be removed from the beginning and end of a String. All consecutive occurrences of character will be removed.

Example

>>> name='   lovejot   ';
>>> name.strip()
'lovejot'

#Spaces removed from the beginning as well as end.

>>> name1='**lovejot**'
>>> name1.strip('*')
'lovejot*'

#* removed from the both the ends.

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Lesson tags: built in string manipulation functions in python, capitalize() method in Python 3, find()  method in Python 3, isalnum() method in Python 3, isalpha() method in Python 3, isdigit() method in Python 3, islower() method in Python 3, isspace() method in Python 3, isupper() method in Python 3, lower() method in Python 3, lstrip() method in Python 3, python 3 string methods, rstrip() method in Python 3, string methods in python with examples, upper() method in Python 3
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