I haven't declared x anywhere. How does it know to reference the index of myarray? Python3, sample code provided.

Question

From the following code:

myarray = [20,10,44,928,200]
for x in myarray:
print(x)

I haven't declared x anywhere. How does it know to reference the index of myarray? Is it because of the "in" clause?
I know it works, but I'm trying to sort out HOW its interpreted. I cant settle for "it just works" I need the concept behind it.

thanks all!

Answer 1

The for statement performs the assignments to x. It is equivalent to

x=myarray[0]
print(x)
x=myarray[1]
print(x)
x=myarray[2]
print(x)
x=myarray[3]
print(x)
x=myarray[4]
print(x)

Answer 2

Zachary Flynn each value is separated by a comma in myarray so x is the individual values within myarray ...

Yes -> The "in" keyword is what triggers the iteration process. It signifies that you want to iterate over the elements of the iterable.

Answer 3

For each element in myarray, assign that element's value to x and then execute the code inside the loop.