JavaScriptCourse/booleans.html at master · karrgov/JavaScriptCourse · GitHub

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<!DOCTYPE html>

<html>
    <head>
        <title>Booleans</title>
    </head>
    <body>
        <script>
            /*
            console.log(3 > 5);
            console.log(5 == "5.00"); //coversion behaviour
            console.log(5 === "5.00"); //no conversion behaviour
            console.log(5 != "5.00"); //conversion behaviour
            console.log(6 !== "6.00"); //no conversion behaviour

            const age = 17;

            if(age >= 18)
            {
                console.log("You can drive");
            }
            else
            {
                console.log("You can not drive");
            }
            */
            /*

            if(5)
            {
                console.log('Truthy');
            }

            if(0)
            {
                console.log('Falsey');
            }

            const cartQuantity = 5;
            if(cartQuantity)
            {
                console.log('Cart has products');
            }
            console.log(!0); //true
            console.log('text' / 5); // NaN
            let unVariable;
            const variableUndefined = undefined;
            console.log(unVariable); //undefined
            */
           const result = true ? 'truthy' : 'falsy';
           console.log(result);

           const result = 0 ? 'truthy' : 'falsy';
           console.log(result);

           const result = 5 > 6 ? 'truthy' : 'falsy';
           console.log(result);

           false && console.log('Hello'); //when we use && like this, its called the guard operator

           const message = false && 'hello';
           console.log(message); //false

           const message = 5 && 'hello'; //using the OR operator to set a deffault value
           console.log(message); //hello

           const currency = 'EUR' || 'USD';
           console.log(currency); //EUR

           const currency = undefined || 'USD';
           console.log(currency); //USD

        </script>
    </body>
</html>