fizzbuzz

gistfile1.py

for i in range(1, 100):
    line = ""
    if i % 3 == 0:
        line += "Fizz"
    if i % 5 == 0:
        line += "Buzz"

    if line == "":
        line = str(i)

    print line

in my interviews I have them do this, then I have them do it without a loop.

without a loop? as in recursively? or as in

print 1
print 2
print "fizz"

I have had people that want to do it manually but yeah, recursion is the right answer here...

var iterator = function iterator(num) {
// modulo stuff here
// eventually call recursively:
iterator(num++);
}(0);

Another thing that is fun to ask is "write a for loop in every language on your resume."
The response you get from that is often kind of scary...