Question

so evidently you write for loops in python int he following:

for i in range(1, 5):
    print i

but what if I’m actually using i as a counting trick and I specifically wanna do something like:

for (int i = 100; i > 20; i--)

or

for (int i = 0; i < 20 ; i += 2)

do you seriously have to write this in the body of the loop rather than the signature….

Answer 1

Different languages use different semantics to say the same thing. You can use the range function in several ways and it has as its arguments:

range(start, stop, jump)

So I can do

range(10, 1, -2)

to get a list like:

[10, 8, 6, 4, 2]

Using the three arguments of range you can get back to your counting tricks from C#, C++, C or Java.