redwood_web_exercises/math-examples.html at master · CodeupClassroom/redwood_web_exercises · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Math examples</title>
</head>
<body>
<script>
    (function () {
        // are arrays objects? yes
        // are functions objects? yes
        // Math has methods
        console.log(Math.round(20.49));  // 20
        console.log(Math.round(20.5));   // 21
        console.log(Math.round(-20.5));  // -20
        console.log(Math.round(-20.51)); // -21

        console.log(Math.floor(45.95)); //  45
        console.log(Math.floor(-45.95)); // -46

        console.log(Math.ceil(.95));   // 1
        console.log(Math.ceil(4));     // 4
        console.log(Math.ceil(7.004)); // 8

        console.log(Math.pow(2, 16));

        console.log(Math.sqrt(9));  // 3
        console.log(Math.sqrt(2));  // 1.414213562373095
        console.log(Math.sqrt(1));  // 1
        console.log(Math.sqrt(0));  // 0
        console.log(Math.sqrt(-1)); // NaN

        console.log(Math.PI);
    })();
</script>
</body>
</html>