i am new to python and i've been trying to wrap my head around this code:

stop = int(input())
result = 0
for a in range(4):
    print(a, end=': ')
    for b in range(2):
        result  = a   b
        if result > stop:
            print('-', end=' ')
            continue
        print(result, end=' ')
    print()

i was wondering why the output is

0: 0 1

1: 2 4

2: 6 -

3: - -

why isn't it

0: 0 1

1: 3 4 --> since we're starting out with a = 1 and b = 2 so result is 1 2 = 3.

etc

i feel like im missing something funamentally. thank u in advance

CodePudding user response：

Value of b will never be 2. Each iteration of loop will initialise the scope variables. i.e. while looping first loop, value of b will range between 0 & 1.

Whereas, Value of result (a global variable) will be cumulative (value obtained from prev iteration).

CodePudding user response：

when a = 0 and b = 1,  result = 0   0   1 = 1, 

so, for a = 1 and b = 0, result = 1   1   0 = 2
when a = 1 and b = 1, result = 2   1   1 = 4

so, it will print 1: 2 4