how to ask for user input in a function. Python related
<p>Is there a way to ask for user input while defining a function?
for example here's a simple function:</p>

<pre><code>def sum3(a,b,c):
    add=a+b+c
    return add
</code></pre>

<p>in the above code, is there a way I can ask the user to
enter 3 numbers.
say, when the program runs
the user sees a prompt saying "please enter 3 numbers"</p>
