setTimeout happens only once in a loop expression

Question

This is an example:

function func1()
{
   setTimeout(function(){doSomething();}, 3000);
}
for(i=0;i<10;i++)
{
   func1();
}

after executing

Answer 1

The for loop is running continuously so each call is 3000 millisecond of that call. Resulting in no delay between two calls. For better understanding, loop call func1 at time t and t + 1. So it will execute at t + 3000 and T + 3001 leaving no difference.

You can try below approach :-

function func1(i){
     setTimeout(function(){doSomething();}, i * 3000);
 }
for(i=i;i<=10;i++){
  func1(i);
}

Note:- Loop intialized with i = 1.