Initialization and assignment

Hi,
I am very much confused with the two things i.e. Initialization and assignment.
Can anyone please explain me what exactly these two things

Thanks

Refer to Stroustrup's glossary:
initialization - giving an object an initial value. Initialization differs from assignment in that there is no previous value involved. Initialization is done by constructors.

suppose I say

int a;
a=123;

then how can we realize this is initialization or assignment

Thanks

Originally Posted by rajesh1978

suppose I say

int a;
a=123;

then how can we realize this is initialization or assignment

Thanks

Anything using '=' after the semicolon on the line of the declaration, is an assignment.

so if we say
int a=123; then it should be initialization
am I correct

Yes.

Originally Posted by rajesh1978

so if we say
int a=123; then it should be initialization
am I correct

as Elysia said, it is initialization, but when you come right down to it, it's still also assignment.

if it were

int a(123);

that would be initialization only. any time you have an '=' it's an assignment, even if it is also initialization.

Originally Posted by Elkvis

any time you have an '=' it's an assignment, even if it is also initialization.

No, rajesh1978's example in post #5 is that of copy initialisation, not "initialisation and assignment", while your example is that of direct initialisation.