O'Reilly logo

Mastering Swift 4 - Fourth Edition by Jon Hoffman

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

The logical NOT operator

The logical NOT operator inverts a Boolean value. Here is a prototype:

varA = !varB 

Here is a example:

var x = true 
var y = !x  //y equals false 

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required