let_vs_const.html

<!DOCTYPE html>
<html>
    <head>
        <title>let vs const</title>
    </head>
<body>
<h2>let vs const</h2>
<p>You can't reassign const variable</p>
<script>
    // with let variable
    let software1 = {
        name: 'Gmail', 
        company: {
            name: 'Google'
        }
    };
    software1.name = 'Apple';
    console.log(software1);

    /*
    Result with let variable
    company: {
        name: "Google"
    }
    name: "Apple"
    */

    software1 = { name : 'Hi'};
    console.log(software1);

    /* result
    {name: "Hi"}
    */
    

    // with const variable
    const software2 = {
        name: 'Gmail', 
        company: {
            name: 'Google'
        }
    };
    software2.name = 'Apple';
    console.log(software2); 

    /*
    Result with const variable
    company: {
        name: "Google"
    }
    name: "Apple"
    */

    software2 = { name : 'Hi'};
    console.log(software2); // get error "let_vs_const.html:49 Uncaught TypeError: Assignment to constant variable."
    
</script>
</body>
</html> 