What is pre increment and post increment?

Answer 1

Let int x=5
Pre increment:(++x) :: First increases the value of x by 1 and then uses new value .
Post increment:(x++)::First uses the value of x(i.e. 5) and then increases the value by 1 .

Answer 2

pre increment:
int a = 5
int b = ++a
a and b will be equals 6 because a is incremented before assignment.

post increment:
int a = 5
int b = a++
b will be equals 5 whilst a is equals 6 because a is incremented after assignment.

Answer 3

https://code.sololearn.com/c0A09B46iMww/?ref=app