`S` is the type of the accumulator (and therefore also the return type).

# getting-started

[hho]

S is the type of the accumulator (and therefore also the return type).

[Abdul Kadir]

Yeah T is the type passed as the Type in the List but we aren't passing S anywhere

[blogscot]

With reduce the accumulator type is determined by the first element of the list being processed. I’ve linked an example:

https://pl.kotl.in/HyrqmCweN

[hho]

You're passing S as the type of the first argument in the lambda. This can be any supertype of the collections element type: https://pl.kotl.in/rk0XOTwx4

[Abdul Kadir]

Thanks a lot:)

[Abdul Kadir]

I didn't provide any type to the accumulator as the compiler automatically inferred it, that threw me off, now I get it 😅