Python Exercises: Alphabet position in a string

Last update on April 19 2025 13:04:49 (UTC/GMT +8 hours)

Replace chars with position numbers.

Write a Python program that takes a string and replaces all the characters with their respective numbers.

Sample Data:
("Python") -> "16 25 20 8 15 14"
("Java") -> "10 1 22 1"
(“Python Tutorial”) -> "16 25 20 8 15 14 20 21 20 15 18 9 1 12"

Sample Solution-1:

Python Code:

# Define a function to return the alphabet position of each letter in a given string
def test(text):
    # Use a list comprehension to generate a list of alphabet positions for each alphabetic character
    # Convert each character to lowercase and use the ord function to get its ASCII value, then subtract 96
    return ' '.join(str(ord(i)-96) for i in text.lower() if i.isalpha())

# Initialize a string representing a word
word = "Python"

# Print the original word
print("Original Word:", word)

# Print a message indicating the alphabet position in the said string
print("Alphabet position in the said string:")

# Call the function to get the alphabet positions and print the result
print(test(word))

# Repeat the process with a different word
word = "Java"

# Print the original word
print("\nOriginal Word:", word)

# Print a message indicating the alphabet position in the said string
print("Alphabet position in the said string:")

# Call the function to get the alphabet positions and print the result
print(test(word))

# Repeat the process with a different word
word = "Python Tutorial"

# Print the original word
print("\nOriginal Word:", word)

# Print a message indicating the alphabet position in the said string
print("Alphabet position in the said string:")

# Call the function to get the alphabet positions and print the result
print(test(word))

Sample Output:

Original Word: Python
Alphabet position in the said string:
16 25 20 8 15 14

Original Word: Java
Alphabet position in the said string:
10 1 22 1

Original Word: Python Tutorial
Alphabet position in the said string:
16 25 20 8 15 14 20 21 20 15 18 9 1 12

Flowchart:

Sample Solution-2:

Python Code:

# Define a function to return the alphabet position of each letter in a given string
def test(text):
    # Use a list comprehension to generate a list of alphabet positions for each alphabetic character
    # Convert each character to lowercase and use the ord function to get its ASCII value,
    # then subtract the ASCII value of 'a' and add 1
    return ' '.join(str(ord(el) - ord('a') + 1) for el in text.lower() if el.isalpha())
	
# Initialize a string representing a word
word = "Python"

# Print the original word
print("Original Word:", word)

# Print a message indicating the alphabet position in the said string
print("Alphabet position in the said string:")

# Call the function to get the alphabet positions and print the result
print(test(word))

# Repeat the process with a different word
word = "Java"

# Print the original word
print("\nOriginal Word:", word)

# Print a message indicating the alphabet position in the said string
print("Alphabet position in the said string:")

# Call the function to get the alphabet positions and print the result
print(test(word))

# Repeat the process with a different word
word = "Python Tutorial"

# Print the original word
print("\nOriginal Word:", word)

# Print a message indicating the alphabet position in the said string
print("Alphabet position in the said string:")

# Call the function to get the alphabet positions and print the result
print(test(word))

Sample Output:

Original Word: Python
Alphabet position in the said string:
16 25 20 8 15 14

Original Word: Java
Alphabet position in the said string:
10 1 22 1

Original Word: Python Tutorial
Alphabet position in the said string:
16 25 20 8 15 14 20 21 20 15 18 9 1 12

Flowchart:

For more Practice: Solve these Related Problems:

Write a Python program to convert each character in a string to its alphabetical position number and join them with spaces.
Write a Python program to iterate over a string and replace each letter with its corresponding position in the alphabet using ord().
Write a Python program to create a function that maps each character of a string to a number, preserving non-alphabetic characters as is.
Write a Python program to use list comprehension to generate a string of numbers corresponding to each character’s position in the alphabet.

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