The following function foobar is supposed to calculate the product of its two parameters.

def foobar$($ a$,$ b $)$:

result $=$ a $*$ b

When we call the function in the code below, it prints out None instead of the product foobar is supposed calculate.

x $=5$

y $=7$

r $=$ foobar$($ x$,$ y $)$

print$($ r $)$

How do we fix this problem?

The following function foobar is supposed to calculate the product of its two parameters.

def foobar$($ a$,$ b $)$:

result $=$ a $*$ b

When we call the function in the code below, it prints out None instead of the product foobar is supposed calculate.

x $=5$

y $=7$

r $=$ foobar$($ x$,$ y $)$

print$($ r $)$

How do we fix this problem?

Add return result at the end of the foobar function definition

Swap the order of the actual parameters in the foobar function call

Change the print statement to print$($ foobar$($ x$,$ y $))$

Move the foobar definition after the print statement