👉 Reducer is a function in functional programming languages that takes an input value and returns a new value. It is used to reduce the size of data by isolating the most relevant information from it, reducing redundancy. In other words, a reducer takes the input value and processes it to produce a single output value. This process can be done by applying a function or transforming one or more inputs into another. The final output is obtained by combining all the processed values into a single result. For example, in