gistfile1.py

for i in [1,2,3]:
  print i
else:
  print 4

#Will print 1 2 3 4
#But if you break the loop...

for i in [1,2,3]:
  print i
  break
else:
  print 4

#This will only print 1
#Usage example
user_input = int(raw_input());
for i in [1,2,3,4]:
  if i == user_input:
    print "found"
    break
else:
  print "not found"