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Practice how to declare data type variable in JavaScript
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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Declare JavaScript Data Type Variables</title> <!--Script tag is added to write JavaScript code inside it--> <script> // number data type for integer and floating point number var integerNumber = 55; var floatNumber = 55.55; // string data type used for text var stringVar = "JavaScript is a great fun."; // Boolean data type var boolVar = true; // Object var person = {firstName:"John", lastName:"Smith"}; function myFunction() { document.getElementById("myNumber").innerHTML = integerNumber + " and " + floatNumber + " are number data type."; document.getElementById("myString").innerHTML = stringVar; document.getElementById("myBool").innerHTML = boolVar + " is a boolean data type."; document.getElementById("myObject").innerHTML = person.firstName + " is the firstName value of person object."; } </script> </head> <body> <h1>How to declare javascript data type varibable?</h1> <button onclick="myFunction()">Click here to see result</button> <p id="myNumber"></p> <p id="myString"></p> <p id="myBool"></p> <p id="myObject"></p> </body> </html>
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