Use of { } brackets

#1

In the video on basic C++ code, Sir used the { } brackets around the cout statements when using ‘if else’ operation, but NOT when he applied cin operator on variables a and b under the input section.

#2

In case of if else statements, if we want to have multiple statements inside an if body or else body, we use
if(condition 1)
{
multiple statements;
}

But for cin, since we need to input values once only, like cin>>a>>b, there is no need of { }. I hope you understood.