Python: Get a string from a given string where all occurrences of its first char have been changed to '$', except the first char itself

Last update on June 12 2025 12:41:47 (UTC/GMT +8 hours)

Replace first char occurrences with $.

Write a Python program to get a string from a given string where all occurrences of its first char have been changed to '$', except the first char itself.

Sample Solution:

Python Code:

# Define a function named change_char that takes one argument, 'str1'.
def change_char(str1):
    # Get the first character of the input string 'str1' and store it in the variable 'char'.
    char = str1[0]

    # Replace all occurrences of the character 'char' with '$' in the 'str1' string.
    str1 = str1.replace(char, '$')

    # Reconstruct the 'str1' string by placing the original 'char' as the first character
    # followed by the modified string starting from the second character.
    str1 = char + str1[1:]

    # Return the modified 'str1' string.
    return str1

# Call the change_char function with the argument 'restart' and print the result.
print(change_char('restart'))  # Output: 'resta$t' 

Sample Output:

resta$t

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to replace all occurrences of the first character in a string with '$', except for the first occurrence, using slicing.
• Write a Python program to iterate through a string and build a new string by replacing subsequent occurrences of the first character.
• Write a Python program to implement this replacement using a for-loop and conditional checks.
• Write a Python program to perform the transformation using the str.replace() method with proper substring handling.

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