example.py

n = [3, 5, 7]

# This is our function `print_list` which takes `x` as an argument.
# `x` is just a name we give it, it could be anything like... `cat` or `dog`
# In real-world examples you would give your arguments meaningful names like `list_to_print`
def print_list(x):
    # Likewise `i` is just a name we've given to a variable
    # You could call this `item` or in this case `number`
    for i in range(0, len(x)):
        # The line above is going to count from 0 to the length of the list we
        # pass as the `x` parameter, in this case 3. So it will count 0, 1, 2 
        # because the last number in the range is excluded.
        
        # The for loop means `i` is going to equal 0 on the first loop, then
        # 1 on the next loop, and finally 2
        
        # The print statement below is going to print the item in the list `n`
        # at the position of `i`.
        
        # Remember lists are Zero Indexed, the first item is at index 0.
        
        # On the first loop the statement will print the item at index 0
        # and then the item at index 1, lastly the item at index 2
        print(n[i])
        

# Here we pass the list `n` to the `print_list` function
print_list(n)