The magnetic field inside a long straight solenoid-carrying current

The magnetic field inside a long straight current-carrying solenoid is uniform and is given by B = μ₀nI, where n is the number of turns per unit length and I is the current. The field lines are parallel to the axis of the solenoid and are uniformly distributed throughout the interior. The field is strong and uniform at the central region, though it does weaken near the ends, but the standard textbook description for the field 'inside' a long solenoid is that it is uniform.