I am confused with Increment and Decrement lesson of php course.Guys need help.....

Question

Php Increment Decrement

Answer 1

Mohammad Shahzar There is two type of increment and decrement. One is Post increment/decrement and another is Pre increment/decrement.

In Pre increment/decrement first value will increment/decrement by 1 then assign to the variable.

In Post increment/decrement first assign the value then increase/decrease the value by 1.

So according to Your

++a is pre increment, --a is pre decrement
a++ is post increment, a-- is post decrement.

Let's take a example:

$a = 1;
$b = $a++; //here we will assign the value of a to b then increase the value by 1

So b will 1 and a will be 2

$c = 1;
$d = ++$c; //here first increase the value of c by 1 then assign to d

So d will be 2 and also c will be 2

Same for pre and post decrement

See here

https://code.sololearn.com/w91r4yofZ45l/?ref=app

Answer 2

Mohammad Shahzar Can you explain in brief where you are getting problem. Increment and decrement is just use to increase and decrease the value by 1.

For example:

$num = 0;

$num++; //it's like $num = $num + 1;

echo $num; //will give 1

same for $num--; //it's like $num = $num - 1;

echo $num;// will give -1

Answer 3

Thnx AJ Anant #G3 for your help

Answer 4

AJ Anant #G3
Can you please define it in bereif what are their differences with example:++a,a++ ,--a and a--