What is the value of y when this code executes?
def foo(x) :
if x > = 0 :
return 6 * x
y = foo(-10)
y = none
y = 60
y = -60
y = 20

The operation of 6*x only executes if x is greater or equal to 0, since x=-10 and -10 is less than 0, the operation does not execute. For this reason,  the value of y using this code is None.

Explanation:

In python a function is defined with the syntaxis:  

def function(x):  

the operation to execute (x)

value to return

In this case, the function is foo and the parameter is x:  

def foo(x):

  if x>= 0:

     return 6*x

The code starts by assigning a value to x. Then, the code asks if the value of x is grater or equal to 0, if this condition is meet, then the code returns the value of 6 times x, if not, then the code does not return a value. In this case, x is -10 and this value is not grater or equal to 0. Given that the condition is not met, then the code stops executing and the value of y is none.