Complex constructions in pseudocode

One of the key skills in programming is to read other people's code. Read the following lines and try to guess what the program will print:

function fun(lol):
    k = 1000
    while k > 0:
        lol = lol * 2
        k = k - 1

for i in (1, 3):
    //print(i)

c = 4
print(c)

Note: Print every number on a new line.