Function argument

Question

How do we choose the type (string, int, float) for the argument?? What is the default variable type in Python?

Answer 1

You don't declare types in Python.

You define like this:

def f(x):
...

And you call like this:

f(5) or f('a') or whatever.

The literal determines the type.

x = 5 # x is an int now
x = 'z' # now x is a str
x = [1, 'v'] # now a list with stuff in it

A variable is not a 'container for a value' like in languages like C or something.

Every name is just a pointer to something that is created and destroyed in the background without you doing anything.

So x can be all sorts of types within the same program.