The provided code defines a function named `input_float` that ensures...

August 30, 2025 at 07:35 AM

def input_float(prompt: str) while True: value = input(f"{prompt}: ") try: return float(value) except ValueError: print("invalid input. Please enter a number")

The provided code defines a function named input_float that ensures the user inputs a valid floating-point number. Here's what the code does:

Detailed Explanation:

  1. Function Definition:

    • The function input_float takes one parameter prompt (a string) that represents the message shown to the user to request input.
    • This uses a while True loop, which keeps prompting the user until a valid float is entered.
  2. Prompting User Input:

    • value = input(f"{prompt}: ") displays the provided prompt message to the user (e.g., "Enter your number:") and allows them to input a value.
  3. Error Handling:

    • The function attempts to convert the input value into a float using float(value).
    • If the conversion succeeds, it immediately returns the numeric floating-point value.
    • If the conversion fails (e.g., the user input is not a valid number), a ValueError is raised.
  4. Handling Invalid Input:

    • When the ValueError exception is caught, the function displays "invalid input. Please enter a number", prompting the user to try again.
  5. Repeating Until Valid Input:

    • The function loops until the user provides a valid floating-point number.
    • Once valid input is received, float(value) is returned, and the loop ends.

Example Usage:

number = input_float("Enter a floating-point number")
print(f"You entered {number}")

If the user enters invalid input (e.g., "abc" or "12a"), the function keeps asking until valid input (e.g., "12.34") is provided.

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