Python: Replace a string "Python" with "Java" and "Java" with "Python" in a given string

Last update on April 17 2025 13:05:45 (UTC/GMT +8 hours)

Swap Python and Java

Write a Python program to replace a string "Python" with "Java" and "Java" with "Python" in a given string.

Input:
English letters (including single byte alphanumeric characters, blanks, symbols) are given on one line. The length of the input character string is 1000 or less.
Input a text with two words 'Python' and 'Java'

Output:
Exchanged character string of Python and Java on one line.

Visual Presentation:

Sample Solution:

Python Code:

# Print statement to prompt the user to input a text with two words 'Python' and 'Java'
print("Input a text with two words 'Python' and 'Java'")

# Split the input text into a list of words
text = input().split()

# Iterate through each word in the text
for i in range(len(text)):
    # Check if 'Python' is present in the current word
    if "Python" in text[i]:
        # Find the index of 'Python' in the current word
        n = text[i].index("Python")
        # Replace 'Python' with 'Java' in the current word
        text[i] = text[i][:n] + "Java" + text[i][n + 6:]
    # Check if 'Java' is present in the current word
    elif "Java" in text[i]:
        # Find the index of 'Java' in the current word
        n = text[i].index("Java")
        # Replace 'Java' with 'Python' in the current word
        text[i] = text[i][:n] + "Python" + text[i][n + 4:]

# Print the modified text with replaced words
print(*text)

Sample Output:

Input a text with two words 'Python' and 'Java'
 Python is popular than Java
Java is popular than Python

Explanation:

Here is a breakdown of the above Python code:

• First the code prompts the user to input a text with the two words 'Python' and 'Java'.
• User input is split into a list of words.
• It iterates through each word in the text.
• Checks if 'Python' is present in the current word and replaces it with 'Java'.
• Checks if 'Java' is present in the current word and replaces it with 'Python'.
• Prints the modified text with replaced words.

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to swap the occurrences of "Python" and "Java" in a multi-line text file.
• Write a Python program to replace "Python" with "Java" and vice versa in a string using regular expressions.
• Write a Python program to simultaneously exchange the words "Python" and "Java" in a given string without using a temporary placeholder.
• Write a Python program to handle overlapping occurrences when swapping "Python" and "Java" in a complex string.

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Python Code Editor:

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