Question

What is the difference between x-- and --x? ​

Answer 1

This question is for kids

x-- means postfix increment

The value of x remains same (i.e., (your value of x) before action

--x means prefix increment

The value of x decreases by 1 (i.e., (your value of x)

Understood!!

Answer 2

Answer:

x-- in this the value of the variable changes after execution , it is also known as post fix

--x and thus the value of the variable changes before the execution, it is also known as prefix

Explanation:

for for example

X is equals to 2

find the value of x in

x= --x + x-- +--x

x= 4+ x-- + --x

x= 4+4+--x

x=8+2

x=10

for explaining

step 1

put the value of--x that is the prefix operator so the value of --x will be 5 - 1 that is 4.

step 2

put the value of x-- that is the post fix operator so the value of x--will be Britain has 4 in the equation but after defining the variable x--the value of x will be 4 - 1 that is 3

step 3

again put the value of--x but now it will not be 4 -1 it will be 3 - 1

because the value of x minus minus is not shown in the equation but after defining the variable its value is changed from 4to 3 and now buy again defining another variable we will use its value as 3 not 4