Question

How to use logical operators (&&, ||, !) in JavaScript

Answer 1

var x = 13;
var y = 5
if (x < 15 && y > 3)  // true
    document.write("1. x < 15 && y > 7" + "<br />"); 

if (x == 13 || y == 5) // true
    document.write("2. x == 13 || y == 5" + "<br />");
    
if (x === 13 || y === 5) // true
    document.write("3. x === 13 || y === 5" + "<br />"); 
    
if (x === 13 || y === "5") // true
    document.write("4. x === 13 || y === \"5\"" + "<br />");   

if ( !(x == y) ) // true
    document.write("5. !(x == y)" + "<br />"); 


  
/*
run:

1. x < 15 && y > 7
2. x == 13 || y == 5
3. x === 13 || y === 5
4. x === 13 || y === "5"
5. !(x == y)

*/

 

70+ SQL courses for beginners and professionals