How to check multiple values in negative expression with optional binding?

Question

I want to check if two optional variables are all null. For example, in C,

int n1 = 1;
int n2 = 2;
if( n1!=0 && n2!=0 ) {
     //  do something.
}

Is there any way to do this in Swift?

Answer 1

Just use the && operator:

// here are the optional variables:
var a: Int? = nil
var b: Int? = nil

if a == nil && b == nil {
    // this will only run if both a and b are nil
}