Simple for loop question

1

for (var j:uint; j<2; j++)
{
for (var i:uint; i<4; i++)
{

        trace("i " + i);
        trace("j " + j);
    }
    
    
}

the output is only i0 j0, i1 j0, i2 j0, i3 j0…
Why isn’t my j increasing?