Chapter 12: Problem 3

Design an algorithm that determines whether the first character in the string variable str is a numeric digit, and if it is, deletes that character.

Short Answer

Expert verified

Question: Design an algorithm that removes the first numeric digit from a given string if it exists. Answer: 1. First, check if the first character in the string is a numeric digit using the 'isdigit()' function. 2. If the first character is a numeric digit, remove it by slicing the string starting from the second character.

Step by step solution

Check if the first character is a numeric digit

To begin, we need to check if the first character in the string variable 'str' is a numeric digit. We can use the 'isdigit()' function in Python, which returns 'True' if the character is a digit and 'False' otherwise.

Remove the first character if it is a numeric digit

If the first character is a numeric digit, we need to remove it from the string. We can do this by slicing the string starting from the second character. Here's the algorithm in Python code: ```python def remove_first_digit(str): if str and str[0].isdigit(): str = str[1:] return str ``` This algorithm performs the following steps: 1. Checks if the 'str' is not empty and if the first character of 'str' is a numeric digit using 'str[0].isdigit()'. 2. If the condition is met, it slices the string starting from the second character, effectively removing the first character. 3. Returns the modified string if the first character was a digit, or the original string if not.

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Design an algorithm that determines whether the first character in the string variable str is a numeric digit, and if it is, deletes that character.

Short Answer

Step by step solution

Check if the first character is a numeric digit

Remove the first character if it is a numeric digit

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