The my_fnctn function takes in three parameters a, b, c. It increments a by 1, sets b equal to b+c, iterates from 1 to b, increments a by 1 if a is less than 10, otherwise it prints 'in here'. The function returns a. When calling my_fnctn(1,2,3), it will return 6, as a is incremented to 6 through the iterations.