For(vector<int>::iterator it = vect.begin();it!= vect.end();++it) { cout<< *it <<" "; }

#1

please explain this.

#2

Hi @abhay170, what we do is:
with

vector::iterator it

make an iterator with name it which will iterate on vectors of int only.

with

vector::iterator it = vect.begin()

we make the it iterator to point to the beginning point/cell of vector vect.

with

it!= vect.end()

we check wether it is pointing to end of vector or not

with

++it

we increment the value of it. It moves one next to the current cell it is on in memory. Same as it was happening in case on pointers. When we did ptr++.

with

cout<< *it <<” “;

Since it is a pointer *it will give the value which it points to. And hence cout will print it’s value.

So basically in above program we are iterating on a vector using a iterator it, one by one and printing the value at every index.

Hope you understand this :slight_smile:

#3

Thanks great explanation!