How can I check if GPS is enabled on the phone programatically? (android)

Question

I want to check if GPS is enabled, but I dont know how to do it.

i mean with a function, in android

EDIT: sorry i forgot to tell you that i am programming with android

Answer 1

System --> Settings --> Locations --> Enable GPS? --> Yes.

Answer 2

if(gps==true){
   //Do Stuff With GPS
} else {
  //Can't do things With GPS  
}