/*  Assignment  Operators

Here, x = 10 and y = 5;

=    x = y
> x = 5

+=   x += y OR x = x + y
> x = 15

-=   x -= y OR x = x - y
> x = 5

*=   x *= y OR x = x * y
> 50

/=   x /= y OR x = x / y
> 2

%=   x %=y OR x = x % y
> 0

*/

// Assign value to a
a = value;
// Assign value to b if b is null;
// otherwise, b stays the same
b ??= value;