Change the varaible in For Loop

[deanhystad]

range() is a generator. i is a variable that you are using to reference the value returned by the generator. The generator doesn't know anything at all about i, and changing i has no effect on the generator. You don't even need i for the generator to work.

for _ in range(5):  # Look Ma, no index!
    print('Hello')

This prints 'Hello' five times.

A while loop does a comparison, so changing the index value does have ah effect. This should work.

i = 0
while i < number_of_qubit-2:
       print(i,i+1)
       i=i+3
       print(i,i+1)
       i=i-1