This is a implicit int, the default return type is int. You can do this with arguments as well like
fun(a, b) {return a + b;}
This defined a function called fun, that return int and take a and b as integers.

I have not been writing C for a long time. Can someone please tell me why we can pass the compiler without explicitly stating the return type?

ooh got it thank you

not an issue, a question (the kata is working fine)

You're printing the result instead of returning it.
You should read this

i confusied with this kata i my code is work's fine on localbut when i submit solution its give's me an error

As of right now, 3,504 buddies have solved this in Python.

is there any buddy already solve with python ?

awesomne

hahaha

woah!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

xD

so far so good :/