We'll need some prompt validation. $($Validating input means checking that it matches some criterion.$)$

Write a function below that prompts a user for a positive floating point number. If the user enters zero or a negative number, print a brief error message, then repeat the prompt for a positive value.

When the user responds with a positive number, return the value of that number as a floating point number.

Your function should have:

No parameters. In other words, if the function were named f$,$ you would call it like this: f$()$

Return value should be the positive floating point number entered by the user.

Choose a good descriptive name for your prompt function, again written in snake case. $($Don$\text{'}$t use f$.)$

$[3]$:

# Write your prompt function definition

def prompt$\_$for$\_$positive$\_$float$()$:

while True:

try:

user$\_$input $=$ float$($input$("$Enter a positive floating point number: $"))$

if user$\_$input $>0$:

return user$\_$input

else:

print$("$Please enter a positive number."$)$

except ValueError:

print$("$Invalid input. Please enter a valid number."$)$

We will also need to test this function.

In the cells below, test your function with:

A positive number given on the first try

A positive number given on the second try

A positive number given on the fourth try

Be sure that your test in some way reports on the return value of the function. An easy way to do this would be to assign the result to a variable, e$.$g$.,$

returned$\_$value $=$ my$\_$function$()$ print$($f$\text{'}$Value returned: $\{$returned$\_$value:f$\}\text{'})$

But you could also just display the value by evaluating returned$\_$value, if that is the last expression in the cell you are running below.