Variables

VARIABILI

Variable is a container storing data

Declaration - var, let, const
Assignment ( = operator )


        let age;

        console.log(age) //result undefined


        age = 21;

        console.log(age) //result 21


        let age = 21;

        console.log(age) //result 21


        let firstName = "Bro";  // string

        let age = 21;  //number

        let student = true; // booleans

        

        age = age + 1; //result 22

        

        console.log(firstName) //result Bro

        console.log(age) //result 21

        console.log(student) //result true

     
        let firstName = "Bro";  // string

        let age = 21;  //numbers

        let student = true; // booleans

        

        console.log("Hello", firstName) //result. Hello Bro

        console.log("You are", age, "years hold") //result. You are 21 years hold

        console.log("enrolled", student) //result true

        
         Html 
        <p>id="p1"<p>

        <p>id="p2"<p>

        <p>id="p3"<p>


         Javascript 
        let firstName = "Bro";

        let age = 21;

        let student = true;

        

        document.getElementById("p1").innerHTML = "Hello " + firstName;

        document.getElementById("p2").innerHTML = "You are " + age + " years old";

        document.getElementById("p3").innerHTML = "Enrolled: " + student;

Monitor result ⬇️