use of cin

Question

what is the difference between storing of some value using "cin" extraction and declaring the value initially like " int a=2"

Answer 1

int a=2;. //is assignment at the time of declaration
while
int a;
cout<<"enter a no";
cin>>a;
//is taking the value from user at time of execution

Answer 2

You use cin when you want the value to be determined by the user, instead of being initialized by the programmer.

Answer 3

If you declare a value like that, it will be a static value defined at compile time. Usually, the users don't have access to the code so they can change the value and compile again. It is also bothersome for users.

Answer 4

cin is used to put the value according to your demand and nothing else.

Answer 5

cin means console input. It is used to get input from the user.