Strings in Python:
“String is a character collection or array”
Well in Python too, for the string data type, we say the same definition. The string is a sequenced character array and is written within single, double, or three quotes. Also, Python does not have the data type character, thus it is used as a string of length 1 if we write ‘r’.
Given a string, the task is to form a new string which is made of the First 2 and Last 2 characters From a Given String in Python.
Examples:
Example1:
Input:
given string =BTechGeeks
Output:
BTks
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Example2:
Input:
given string =AplusTopper
Output:
Aper
Program to Form a New String Made of the First 2 and Last 2 characters From a Given String
Below is the full approach to form a new string which is made of the First 2 and Last 2 characters From a Given String in Python.
- Using indexing, Slicing, and Count Variable(Static Input)
- Using indexing, Slicing, and Count Variable(User Input)
- Using indexing, Slicing, and len() function(Static Input)
- Using indexing, Slicing, and len() function(User Input)
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1)Using indexing, Slicing, and Count Variable(Static Input)
Approach:
- Give the string as static input and store it in a variable.
- Take a variable to say stringcharacters that stores the total characters in the given string.
- Initialize the stringcharacters to 0.
- Traverse through the given string using For loop.
- Increment the value of stringcharacters by 1.
- Using String Concatenation and slicing form the new string with which is made of the First 2 and Last 2 characters From a Given String.
- Print the modified string.
- The Exit of the Program.
Below is the implementation:
# Give the string as static input and store it in a variable.
given_strng = 'BTechGeeks'
# Take a variable to say stringcharacters that stores the total characters in the given string.
# Initialize the stringcharacters to 0.
stringcharacters = 0
# Traverse the given string using for loop.
for charact in given_strng:
# Increment the value of stringcharacters by 1.
stringcharacters = stringcharacters+1
# Using String Concatenation and slicing form the new string with which is made of the First two
# and Last two characters From a Given String.
resstring = given_strng[0:2]+given_strng[stringcharacters-2:stringcharacters]
# print the result string
print(resstring)
Output:
BTks
2)Using indexing, Slicing, and Count Variable(User Input)
Approach:
- Give the string as user input using the input() function and store it in a variable.
- Take a variable to say stringcharacters that stores the total characters in the given string.
- Initialize the stringcharacters to 0.
- Traverse through the given string using For loop.
- Increment the value of stringcharacters by 1.
- Using String Concatenation and slicing form the new string with which is made of the First 2 and Last 2 characters From a Given String.
- Print the modified string.
- The Exit of the Program.
Below is the implementation:
# Give the string as user input using the input() function and store it in a variable.
given_strng = input('Enter some random string = ')
# Take a variable to say stringcharacters that stores the total characters in the given string.
# Initialize the stringcharacters to 0.
stringcharacters = 0
# Traverse the given string using for loop.
for charact in given_strng:
# Increment the value of stringcharacters by 1.
stringcharacters = stringcharacters+1
# Using String Concatenation and slicing form the new string with which is made of the First two
# and Last two characters From a Given String.
resstring = given_strng[0:2]+given_strng[stringcharacters-2:stringcharacters]
# print the result string
print(resstring)
Output:
Enter some random string = AplusTopper Aper
Explanation:
- A string must be entered by the user and saved in a variable.
- The count variable is set to zero.
- The for loop is used to go over the characters in a string.
- When a character is encountered, the count is increased.
- String slicing is used to create the new string, and the first and last two characters of the string are concatenated using the ‘+’ operator.
- The string that has just been formed is printed.
3)Using indexing, Slicing, and len() function(Static Input)
Approach:
- Give the string as static input and store it in a variable.
- Calculate the length of the string using the len() function and store it in a variable.
- Using String Concatenation and slicing form the new string with which is made of the First 2 and Last 2 characters From a Given String.
- Print the modified string.
- The Exit of the Program.
Below is the implementation:
# Give the string as static input and store it in a variable. given_strng = 'BTechGeeks' # Calculate the length of the string using the len() function and store it in a variable. stringcharacters = len(given_strng) # Using String Concatenation and slicing form the new string with which is made of the First two # and Last two characters From a Given String. resstring = given_strng[0:2]+given_strng[stringcharacters-2:stringcharacters] # print the result string print(resstring)
Output:
BTks
Here string concatenation is used to combine the characters using string slicing and length of the string.
4)Using indexing, Slicing, and len() function(User Input)
Approach:
- Give the string as user input using the input() function and store it in a variable.
- Calculate the length of the string using the len() function and store it in a variable.
- Using String Concatenation and slicing form the new string with which is made of the First 2 and Last 2 characters From a Given String.
- Print the modified string.
- The Exit of the Program.
Below is the implementation:
# Give the string as user input using the input() function and store it in a variable.
given_strng = input('Enter some random string = ')
# Calculate the length of the string using the len() function and store it in a variable.
stringcharacters = len(given_strng)
# Using String Concatenation and slicing form the new string with which is made of the First two
# and Last two characters From a Given String.
resstring = given_strng[0:2]+given_strng[stringcharacters-2:stringcharacters]
# print the result string
print(resstring)
Output:
Enter some random string = AplusTopper Aper
Here string concatenation is used to combine the characters using string slicing and length of the string.
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