Python Program to Extract Only Characters from a Given String

In the previous article, we have discussed Python Program to Add Trailing Zeros to String
Given a string and the task is to extract only characters (alphabets) from a given string.

Examples:

Example1:

Input:

Given String = hello 123 this is Btech Geeks python3 coding platform54231

Output:

The Given String after extracting only characters = hellothisisBtechGeekspythoncodingplatform

Example2:

Input:

Given String=good morning23this is btechgeeks@19python

Output:

The Given String after extracting only characters = goodmorningthisisbtechgeekspython

Program to Extract Only Characters from a Given String

Below are the ways to Extract Only Characters from a given String. Here we used ASCII values to get the result.

Using ASCII Values (Static Input)
Using ASCII Values (User Input)

Method #1: Using ASCII Values (Static Input)

Approach:

Give the string as static input and store it in the variable.
Take a new empty string to store only characters from the above-Given String.
Traverse in this given string using the For loop.
Inside the for loop, Check each letter of the above-given string is only a character or not by using the ord( ) method.
Ord( ) method gives the ASCII values of the character.
Check the elements of the given string are Upper case Characters by using if conditional statement and concatenate it to the above declared new string.
Else Check for the Lower case Characters by using Elif conditional statement and concatenate it to the above declared new string.
Print the above declared new String(has only characters).
The Exit of the Program.

Below is the implementation:

# Give the string as static input and store it in the variable.
gven_stng = 'hello 123 this is Btech Geeks python3 coding platform54231'
# Take a new empty string to store only characters from the above Given String
only_chrs = ""
# Traverse in this given string using the For loop
for chrs in gven_stng:
    # Inside the for loop, Check each letter of the above given string is only a character
    # or not by using ord( char) method .
    # Ord( ) method gives the ASCII values of the character.
    # Check the elements of the given string are Upper case Characters by using if conditional
    # statement and concat it to the above declared new string.
    if ord(chrs) >= 65 and ord(chrs) <= 90:
        only_chrs += chrs
# Else Check for the Lower case Characters by using Elif conditional statement and
# concat it to the above declared  new string.
    elif ord(chrs) >= 97 and ord(chrs) <= 122:
        only_chrs += chrs
# print the above declared new String(has only characters).
print('The Given String after extracting only characters =',only_chrs)

Output:

The Given String after extracting only characters = hellothisisBtechGeekspythoncodingplatform

Method #2: Using ASCII Values (User Input)

Approach:

Give the string as user input using the input() function and store it in the variable.
Take a new empty string to store only characters from the above-Given String.
Traverse in this given string using the For loop.
Inside the for loop, Check each letter of the above-given string is only a character or not by using the ord( ) method.
Ord( ) method gives the ASCII values of the character.
Check the elements of the given string are Upper case Characters by using if conditional statement and concatenate it to the above declared new string.
Else Check for the Lower case Characters by using Elif conditional statement and concatenate it to the above declared new string.
Print the above declared new String(has only characters).
The Exit of the Program.

Below is the implementation:

# Give the string as user input using the input() function and store it in the variable.
gven_stng = input('Enter some random string = ')
# Take a new empty string to store only characters from the above Given String
only_chrs = ""
# Traverse in this given string using the For loop
for chrs in gven_stng:
    # Inside the for loop, Check each letter of the above given string is only a character
    # or not by using ord( char) method .
    # Ord( ) method gives the ASCII values of the character.
    # Check the elements of the given string are Upper case Characters by using if conditional
    # statement and concat it to the above declared new string.
    if ord(chrs) >= 65 and ord(chrs) <= 90:
        only_chrs += chrs
# Else Check for the Lower case Characters by using Elif conditional statement and
# concat it to the above declared  new string.
    elif ord(chrs) >= 97 and ord(chrs) <= 122:
        only_chrs += chrs
# print the above declared new String(has only characters).
print('The Given String after extracting only characters =', only_chrs)

Output:

Enter some random string = good morning23this is btechgeeks@19python
The Given String after extracting only characters = goodmorningthisisbtechgeekspython

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