Python: Get Numeric Value from User Input

In Python, you can get numeric data from user input by using the input() function in combination with error handling. Below are the main steps:

1. Prompt the user for input using the input() function.
2. Because the value returned by the input() function is a string, we have to convert it to a numeric value by using appropriate conversion functions like int() or float().
3. Handle any conversion errors with a try-except block. Display an error message and asking the user to re-enter a number if the current data is inappropriate.
4. Use a while loop to repeat the process above until a valid numeric input is provided.

Code example:

while True:
    try:
        value = float(input("Enter a number: "))
        break
    except ValueError:
        print("Invalid input. Please enter a valid number.")

print("The entered number is:", value)

Run the program, enter abc, then enter 123 and you will get the following output:

Enter a number: abc
Invalid input. Please enter a valid number.
Enter a number: 123
The entered number is: 123.0

That’s it. If you have any questions related to Python programming, feel free to leave a comment. Happy coding & have a nice day!