Increament operators

Question

what does this really mean ? and where we can use it ? any details ? thanks

Answer 1

There would be a difference, you are overthinking this it feels like.

num3 = num2 ++ + ++num1

which translates to

num3 = num2 + (num1 +1)
(num2 + 1)

Again,

Pre (before)
Post (After)

Answer 2

hope this will help you
http://www.c4learn.com/java/java-increment-decrement-operator/
for demo code
https://www.w3schools.com/js/tryit.asp?filename=tryjs_oper_incr

Answer 3

ty

Answer 4

but didnt understand the difference between of 2++ & ++2 or something like this

Answer 5

Think about it as pre and post.

Pre: Before. Increment the value before using it in the statement.

Post: Increment the value after using it in the statement.

So cout << ++2 would output 3 because we increment 2 BEFORE using it in the cout statement.

cout << 2++ would output 2 then increment 2 by 1 to 3 AFTER using the 2 in the cout statement.

Answer 6

x=5
y=x++
cout<<y; is 6?
if yes then what about this ?
x=5
y=++x
cout<<y; ??? Josh Schweigert

Answer 7

no opposite.

Answer 8

Josh Schweigert can u pls expain this issue in any other way ?

Answer 9

You have the exact thing just backwards. I don't know how to be any more clear.

Answer 10

int num1;
int num2;
int num3;

num1=100;
num2=++num1;
num3=num2++ + ++num1

in here in num3 the value of num2 is 101+1=102 + 1+100 which is equals to 203...
my question is that num2++ or ++num2 is the same ? because both adds 1 to the value. if yes then what is the difference...
Josh Schweigert

Answer 11

When the ++ sign is before the value then it is called pre increment which means the value is incremented before termination and if the ++ sign is after the value then the value is incremented at the next step of termination.
Hope it helps you

Answer 12

Quisiera hacer una tabla de multiplicar del 1 al 10, y tengo hecho
<?php
//$b es el multiplicando
$b = array(1,2,3,4,,5,6,7,8,9);
$producto = 0;
//$u es el multiplicador
$u = 1;
for ($u = 1; $u <= 10; $u++) {
$producto *= $b[$u];
}
echo "El valor del producto es = $producto . <br />;
?>

El problema que tengo es que no me funciona la línea $producto *= $b[$u]. Cómo se haría?

Gracias