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.
Many people using this medication do not have serious side effects. Stop using hydroquinone and tell your doctor right away if any of these unlikely but serious side effects occur: blistering, skin cracking, blue-black darkening of the skin. A very serious allergic reaction to this drug is rare.