A banana is an elongated, edible fruit - botanically a berry - produced by several kinds of large herbaceous flowering plants in the genus.
https://en.wikipedia.org/wiki/Banana
Raw bananas (not including the peel) are 75% water, 23% Carbohydrates, 1% Protein, and contain negligible fat. A 100-gram reference serving supplies 89 Calories
, 31% of the US recommended 
Daily Value (DV) of vitamin B6 and moderate amounts of vitamin C, manganese, and dietary fiber, with no other micronutrients
 Insignificant content (see table).