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Given a string to the function string_expand() , do complete it. String is made up of a character followed by integer. Do create a new string in which each character occurs for the respective number of times given  and return the newly created string.Input Format:No need to read input , as it is predefined in main.Output Format:No need to print just return the string from function.Constraints:1 <= String <= 10^4Sample Input 1:t12k20a1c5Sample Output 1:ttttttttttttkkkkkkkkkkkkkkkkkkkkacccccSample Input 2:a2b1c3Sample Output 2:aabccc

Question

Given a string to the function string_expand() , do complete it. String is made up of a character followed by integer. Do create a new string in which each character occurs for the respective number of times given  and return the newly created string.Input Format:No need to read input , as it is predefined in main.Output Format:No need to print just return the string from function.Constraints:1 <= String <= 10^4Sample Input 1:t12k20a1c5Sample Output 1:ttttttttttttkkkkkkkkkkkkkkkkkkkkacccccSample Input 2:a2b1c3Sample Output 2:aabccc

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Solution

To solve this problem, we can follow the steps below:

  1. Define a function named string_expand that takes no arguments.
  2. Inside the function, create an empty string variable named expanded_string to store the expanded string.
  3. Iterate over each character in the input string.
  4. Check if the current character is a letter using the isalpha() function.
  5. If the character is a letter, store it in a variable named current_char.
  6. If the character is a digit, convert it to an integer using the int() function and store it in a variable named repeat_count.
  7. Append current_char repeated repeat_count times to the expanded_string using the += operator.
  8. After the loop finishes, return the expanded_string.

Here is the implementation of the string_expand function:

def string_expand():
    input_string = "t12k20a1c5"  # Predefined input string
    expanded_string = ""

    current_char = ""
    repeat_count = 0

    for char in input_string:
        if char.isalpha():
            current_char = char
        else:
            repeat_count = int(char)
            expanded_string += current_char * repeat_count

    return expanded_string

To test the function, you can call it and print the result:

print(string_expand())  # Output: tttttttttttkkkkkkkkkkkkkkkkkkkkaccccc

This will give you the expected output for the given input string.

This problem has been solved

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