Should You Invest with Student Loans?

On average, students who graduated in 2018 entered the workforce with a student loan debt of $39,400 - equating to a 6% increase from the previous year - and the average for those who go on to pursue Masters or Doctorate degrees is even higher still. So the question is; is it okay to invest while still paying off student loans? Or should you just pay off your loan first and then invest later in life?