Can you explain. ...++a. Or --a ?

Answer 1

Hello

++ or -- are unary increment or decrement operators.

Now,

when you write say

a++; it is Post increment
and
++a; it is Pre increment

now lets take a variable say i

int i;

if you write

a = 5;
i = a++;
then the value of i will be 5.
and value of a will be incremented after Semi Colon.

but it you write

a = 5;
i = ++a;
then the value of i will be 6, as a is incremented first and then value is assigned to the variable i.

Answer 2

++a is upcreased nuber for one,--a is decreased nuber for one.
for exapmle ++5 is 6 but --5 is 4...