I have a program to execute per 15 seconds, how can I achieve this, the program is as followed:

```
print_test<-function{
cat("hello world")
}
```

Answer:

You can do something like this:

```
print_test<-function(x)
{
Sys.sleep(x)
cat("hello world")
}
print_test(15)
```

If you want to execute it for a certain amount of iterations use to incorporate a 'for loop' in your function with the number of iterations.

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