Control flow allows you to direct the flow of code depending on the conditions which are given. Here are the main operators used in comparison evaluations.
4 > 10 // false 'hi' > 'hello' // true, checks if greater alphabetically 4 >= 3 // true
The difference between the first two conditionals can be show by a simple example:
3 == '3' // true 3 === '3' // false, must be of same type 3 != 3 // false
The logical operators AND or OR allow you to group two evaluations together. An AND evaluates to true only if both sides of the expression are true, while an OR evaluates to true if either side is true.
To get the opposite of an evaluation, use the exclamation mark (!). This will turn a false into true and vice versa.
!true; // false ! (3 > 3) // true 4 < 3 && 2 < 5; // true true || false // true
This book teaches HTML as if it's for anyone - hobbyists, students, and professionals - and it's full-color throughout. It utilizes information graphics and lifestyle photography to explain the topics in a simple way that is engaging. You can progress through the chapters from beginning to end or just dip into topics of particular interest at your leisure.$ Check price
Stretch out your back and relieve your back muscles with inversion therapy. This device counteracts the forces of gravity on the body by decompressing and elongating the spine. By using this product just ten minutes a day, you can be well on your way to improved circulation and posture while relieving muscle aches, back pain and stress.$$ Check price