Difference between concatMap and flatMap ?

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Q1. Difference between concatMap and flatMap ?

Ans. Flatmap converts stream(s) into a single streams without maintaining a order where as concatmap does the same along with maintaining the order

flatmap example -[[1,2,3],[4,5,6],[7,8,9]] -> [1,4,7,2,5,8,3,6,9]

concatmap example -[[1,2,3],[4,5,6],[7,8,9]] -> [1,2,3,4,5,6,7,8,9]

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