what is the difference between "++num1" and "num1++"

Answer 1

https://code.sololearn.com/c68JVx3xS9B0/?ref=app

check it out

Answer 2

++num1 increments num1 by one then assigns it, num1++ assings the current value then only increments it.

Answer 3

++num1 increment the num value then assigns while num++ it only gives a current value of number.