What is the difference between ++a and a++.

Question

I am learning javascript please clear my the doubt with simple example

Answer 1

https://www.sololearn.com/Discuss/407846/?ref=app

Answer 2

https://www.sololearn.com/discuss/531271/?ref=app

Answer 3

++a increments the value of a at the same instant as its executed ,but a++ will increment the value of a after its used once.
ex:
int a,b;
a=7;
b=++a;
cout<<b; //this will return 8.

but,
b=a++;
cout<<b; //this will return 7only .