Hi all,

why n++ executes faster than n+1?


Sabita

Hi,
Possibly the most well known operator in C++; ++ is a unary operator that can be applied to variables and increments the value they hold. For example often for loops have, as their increment-expr something like:-

counter++


why this is faster than the normal increment statement (n++ instead of n=n+1) , because normally the C++ compiler will compile or execute a statement from left to right compilation. Say for an example

n=n+1;

the compilation is like this

1. first take 1 into memory
2. take + operator add compilation
3. Take n and looking for value
4. Do the caluculation the variable (n+1)=>(n=10,n+1=11)
5. And finaly add to the n memory.

But whereas in n++, the compiler will do

1. Take ++ operator
2. Take the n memory value, and do the calculation, assign to n memory

This is why the ++ is faster than the normal calculation(increment). Hope you got the information.

thanks

__________________
Karpagarajan. R
Necessity is the mother of invention