JavaScript Logical Operators (&& (And) Operators, || (Or) Operators, ! (Not) Operators)

 JavaScript Logical Operators

1. &&  // And

2. ||     // Or

3. !      //Not

Examples: 

|| (Or)  Operators

var name = "hera";

if(name === "hera" || name === "didar") {

    alert("Hi, " + name);

}

undefined   // website show us:  Hi, hera

name = "didar";

'didar'

if(name === "hera" || name === "didar") {

    alert("Hi, " + name);

}

undefined   // website show us:  Hi, didar

Examples: 

&& (And)  Operators

var firstName = "md";

var lastName = "hera";

if(firstName === "md" && lastName === "hera") {

    alert("Hi, " + firstName + " " + lastName);

}

undefined      // Website show us: Hi, md hera

Examples: 

! (Not)  Operators

var name = “hera”;

if(!(name === "boobs")) {

     alert("Hi, unknown guy")

}

undefined   // Website show us: Hi, unknown guy

!false

Website show us: true Or, (!true Website show us: false)