In the previous article, we have discussed Python Program to Extract Only Characters from a Given String
Given two strings, the task is to find the common characters between Two Strings.
In this case, we use some of the built-in functions like join(), lower(), sorted() and intersection() methods.
join() :
The string method join() takes all of the items in an iterable and returns a string after joining them all together. Iterable types include list, tuple, string, dictionary, and set.
lower() :
As the name indicates, It takes a string and converts all uppercase characters to lowercase before returning it.
sorted method() :
The sorted() method is used to orderly sort the elements of a sequence (either ascending or descending).
intersection() method :
The intersection() method is used to find all the elements that are shared by two given sets.
Examples:
Example 1:
Input:
Given First String = Hello Btechgeeks Given Second String = good morning
Output:
The Common Characters between the above given two Strings = go
Example 2:
Input:
Given First String = have a nice Day Given Second String = A special day
Output:
The Common Characters between the above given two Strings = acdeiy
Program to Find Common Characters between Two Strings
Below are the ways to find common characters between two strings.
Method #1: Using intersection Method (Static Input)
Approach:
- Give the first string as static input, convert the given string into the lower case using the built-in lower() method and store it in a variable.
- Give the second string as static input, convert the given string into the lower case using the built-in lower() method and store it in another variable.
- Get the Common characters between both the above-given strings using the built-in intersection() method which is a set method.
- Sort the above-given string using the built-in sorted() method.
- Join the above-given string using the built-in join()method.
- Print all the Common Characters between the above given two Strings.
- The Exit of the program.
Below is the implementation:
# Give the first string as static input , convert the given string into lower case
# using built-in lower() method and store it in a variable.
fst_strng = "Hello Btechgeeks".lower()
# Give the second string as static input , convert the given string into lower case
# using built-in lower() method and store it in another variable.
secnd_strng = "good morning".lower()
# Get the Common characters between both the above given strings using built-in
# intersection() method which is a set method.
# Sort the above given string using built-in sorted() method.
# Join the the above given string using built-in join()method .
# Print all the Common Characters between the above given two Strings.
print("The Common Characters between the above given two Strings = ",
''.join(sorted(set.intersection(set(fst_strng), set(secnd_strng)))))
Output:
The Common Characters between the above given two Strings = go
Method #2 : Using intersection() Method (User Input)
Approach:
- Give the first string as User input using the input() function, convert the given string into the lower case using the built-in lower() method and store it in a variable.
- Give the second string as User input using the input() function, convert the given string into the lower case using the built-in lower() method, and store it in another variable.
- Get the Common characters between both the above-given strings using the built-in intersection() method which is a set method.
- Sort the above-given string using the built-in sorted() method.
- Join the above-given string using the built-in join()method.
- Print all the Common Characters between the above given two Strings.
- The Exit of the program.
Below is the implementation:
# Give the first string as User input using the input() function , convert the given string into lower case
# using built-in lower() method and store it in a variable.
fst_strng = input("Enter some Random String = ").lower()
# Give the second string as User input using the input() function, convert the given string into lower case
# using built-in lower() method and store it in another variable.
secnd_strng = input("Enter some Random String = ").lower()
# Get the Common characters between both the above given strings using built-in
# intersection() method which is a set method.
# Sort the above given string using built-in sorted() method.
# Join the the above given string using built-in join()method .
# Print all the Common Characters between the above given two Strings.
print("The Common Characters between the above given two Strings = ",
''.join(sorted(set.intersection(set(fst_strng), set(secnd_strng)))))
Output:
Enter some Random String = have a nice Day Enter some Random String = A special day The Common Characters between the above given two Strings = acdeiy
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