What is the differance between --x and x--?

Question

challenges made me confused between them .

Answer 1

--x has "-- " preceding x which means whenever code runs and it is going to work on x then it will first decrease x by1 and then use it .
but in case of x-- the code will first use the current value of x once and then decrease it with on
it would not decrease x till its current value is used once 😉hope u got it .......

Answer 2

Yep, you got it!
int x = 3;
cout << --x; // outputs 2
int y = 3;
cout << y--; // outputs 3, then decrements y
cout << y; // so this outputs 2 now.

Answer 3

--x decrements the value first and uses the new value in the statement.
x-- first executes the statement and decrements the value of x after that.

Answer 4

You're welcome ^^

Answer 5

yeah , I got it . thanks @tashi N 😀

Answer 6

so , in --x the new value will be excuted . However x-- the value won't be excuted in the statement . right?

Answer 7

good explanation . now I completely can differentiate between them, thank you @Nitish Rawat :)

Answer 8

did you change your name .. I thought your name is Nitish

Answer 9

good brother ..😃

Answer 10

I am now in college.

Answer 11

I hope you have nice time in studying

Answer 12

engineering .but how did you know?

Answer 13

welcome enas 😊

Answer 14

actually 😂it is abhishek my younger brother changed it for fun ...

Answer 15

its easy to guess . u r in college 1yr . in India first year engineering syllabus has c++

Answer 16

I meant than not only in India but mostly everywhere first year engineering has c++
by the way good luck ...

Answer 17

for ur engineering dear

Answer 18

same here

Answer 19

engineering or bsc in computer sciences?