For example if we have x=953, I want to select specifically the first digit (or the last two) and save it in another variable, so the outcome would be y=9 (or y=53)
Hydroquinone has also been linked to a medical condition in humans called ochronosis. This condition has actually been found in humans, not rodents, but the evidence is inconclusive at the moment. Ochronosis is a condition where the affected skin darkens in color, and also becomes thicker in texture.
1 Protect your skin from the sun during and after the use of hydroquinone cream. Limit sun exposure, use a sunscreen, and wear protective clothing to cover the treated areas.  Hydroquinone cream is for external use only. Avoid getting hydroquinone cream in your eyes, nose, or mouth, or on your lips.