How are subroutines used?

Answer:
Subroutine is an instruction sequence in a machine or assembly language program that can be prewritten and referred to as often as needed. Subroutine is used for controlling thing e.g. traffic lights burglar alarms they all use subroutine
First answer by ID1000847369. Last edit by Karsigan123. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 1 [recommend question].