Basic Interrupt Question

Projects Programming
1

Hi there,

I have an arduino uno (just starting out) and I am a little confused about the "attachInterrupt(interrupt, ISR, mode)" function. The first parameter is described as "the interrupt number"; what do they mean by that?

I am just trying to have a counter running in loop() and have an led turn on when my switch changes status.

Thanks!

2

Did you read the page you linked?
Interrupt zero, pin two, interrupt one, pin three on a Uno

3

Are you planning on using an interrupt because you want to understand how they work or because you think you need an interrupt to do what you want ?